diff --git a/app/assets/javascripts/order.js b/app/assets/javascripts/order.js
index 929feb09..baf0c5f4 100644
--- a/app/assets/javascripts/order.js
+++ b/app/assets/javascripts/order.js
@@ -1,10 +1,11 @@
 
 function doTheDownload(selectedGroupOrderIds, orderId, url, supplier, mode = "all") {
+  console.log(selectedGroupOrderIds);
   if (mode == "all") {
     var data = { order_id: orderId }
   }
   else {
-    var data = { group_order_ids: selectedGroupOrderIds }
+    var data = { multi_group_order_ids: selectedGroupOrderIds }
   }
   if (mode == "all" || selectedGroupOrderIds.length > 0) {
     //suppress generic error warning
@@ -73,7 +74,6 @@ function doTheDownload(selectedGroupOrderIds, orderId, url, supplier, mode = "al
   }
 }
 
-
 $(document).off('change', '[class^="ajax-update-all-link-"] select').on('change', '[class^="ajax-update-all-link-"] select', function () {
   var selectedValue = $(this).val();
   var url = $(this).closest('a').attr('href');
@@ -108,24 +108,66 @@ $(document).off('change', '[class^="ajax-update-link-"] select').on('change', '[
 
 $(document).on('ready turbolinks:load', function () {
   $('.expand-trigger').click(function () {
-    var orderId = $(this).closest('tr').data('order_id');
-    var expandedRow = $('#expanded-row-' + orderId);
+    var tableRow = $(this).closest('tr')
+    var orderId = tableRow.data('order_id');
+    var multiOrderId = tableRow.data('multi_order_id');
+
+    if(multiOrderId != undefined){
+      var expandedRow = $('#expanded-multi-row-' + multiOrderId);
+      console.log(multiOrderId);
+    }
+    else
+    {
+      var expandedRow = $('#expanded-row-' + orderId);
+    }
     // Toggle visibility of the expanded row
-    expandedRow.slideToggle();
+
+    expandedRow.toggleClass('hidden');
+    
+    tableRow.toggleClass('border');
+    expandedRow.toggleClass('bordered');
 
     return false; // Prevent the default behavior of the link
+  });  
+});
+
+$(document).on('click', '.merge-orders-btn', function () {
+  const url = $(this).data('url');
+  const selectedOrderIds = $('input[name="order_ids_for_multi_order[]"]:checked').map(function () {
+    return $(this).val();
+  }).get();
+
+  if (selectedOrderIds.length === 0) {
+    alert("Bitte wählen Sie mindestens eine Bestellung aus.");
+    return;
+  }
+
+  $.ajax({
+    url: url,
+    method: 'POST',
+    data: { order_ids_for_multi_order: selectedOrderIds },
+    success: function (response) {
+      window.location.reload();
+    },
+    error: function (xhr) {
+      window.location.reload();
+    }
   });
 });
 
 $(document).off('click', '[id^="collective-direct-debit-link-selected-"]').on('click', '[id^="collective-direct-debit-link-selected-"]', function (e) {
   e.preventDefault();
+  var input = "group_order_ids_for_order_"
   var orderId = $(this).data("order-id");
   var supplier = $(this).data("supplier");
+  if (orderId == undefined) {
+    orderId = $(this).data("multi-order-id");
+    input = "group_order_ids_for_multi_order_"
+  }
   // Extract selected group_order_ids
-  var selectedGroupOrderIds = $('input[name^="group_order_ids_for_order_' + orderId + '"]:checked').map(function () {
+  var selectedGroupOrderIds = $('input[name^="'+ input + orderId + '"]:checked').map(function () {
     return $(this).val();
   }).get();
-  console.log(selectedGroupOrderIds);
 
   var url = $(this).closest('a').attr('href');
   doTheDownload(selectedGroupOrderIds, orderId, url, supplier, "selected");
diff --git a/app/assets/stylesheets/group_order_invoices.css b/app/assets/stylesheets/group_order_invoices.css
index 036b9966..f328e955 100644
--- a/app/assets/stylesheets/group_order_invoices.css
+++ b/app/assets/stylesheets/group_order_invoices.css
@@ -26,6 +26,29 @@
 }
 
 
+.expanded-row{
+  td {
+    padding-top: 0 !important;
+  }
+}
+.hidden{
+  display: none;
+}
+.border td{
+  background-color: rgb(231, 231, 194) !important;
+}
+
+.bordered {
+  .order-modal{
+    background-color: lightgoldenrodyellow !important;
+    padding-bottom: 2em ;
+  }
+  .multi-order-modal{
+    background-color: lightgoldenrodyellow !important;
+    padding-bottom: 2em ;
+  }
+}
+
 .table.group-order-invoices-table tr{
   background-color: rgb(255, 255, 233);
 }
diff --git a/app/controllers/concerns/send_group_order_invoice_pdf.rb b/app/controllers/concerns/send_group_order_invoice_pdf.rb
index 76e71c99..0734ea2d 100644
--- a/app/controllers/concerns/send_group_order_invoice_pdf.rb
+++ b/app/controllers/concerns/send_group_order_invoice_pdf.rb
@@ -7,6 +7,14 @@ module Concerns::SendGroupOrderInvoicePdf
     invoice_data = group_order_invoice.load_data_for_invoice
     invoice_data[:title] = t('documents.group_order_invoice_pdf.title', supplier: invoice_data[:supplier])
     invoice_data[:no_footer] = true
+    puts "
+    " + "____________" + "
+    " + "____________" + "
+    " + "____________" + "
+    " + "#{invoice_data.inspect}" + "
+    " + "____________"+ "
+    " + "____________"+ "
+    " + "____________"
     GroupOrderInvoicePdf.new invoice_data
   end
 
diff --git a/app/controllers/finance/balancing_controller.rb b/app/controllers/finance/balancing_controller.rb
index 6c63b055..72eb62c0 100644
--- a/app/controllers/finance/balancing_controller.rb
+++ b/app/controllers/finance/balancing_controller.rb
@@ -1,7 +1,14 @@
 class Finance::BalancingController < Finance::BaseController
   def index
-    @multi_orders = MultiOrder.includes(:orders, :group_orders).page(params[:page]).per(@per_page).order('ends DESC')
-    @orders = Order.finished.non_multi_order.page(params[:page]).per(@per_page).order('ends DESC')
+    page = params[:page].to_i
+    page = 1 if page < 1
+    per_page = @per_page.to_i
+    offset = (page - 1) * per_page
+
+    multi_orders = MultiOrder.includes(:orders, :group_orders).page(params[:page]).per(@per_page).order('ends DESC')
+    orders = Order.finished.non_multi_order.page(params[:page]).per(@per_page).order('ends DESC')
+    combined = (multi_orders + orders).sort_by { |r| r.ends }.reverse
+    @results = Kaminari.paginate_array(combined).page(params[:page]).per(@per_page)
   end
 
   def new
diff --git a/app/controllers/group_order_invoices_controller.rb b/app/controllers/group_order_invoices_controller.rb
index eaa3b62e..c72854b5 100644
--- a/app/controllers/group_order_invoices_controller.rb
+++ b/app/controllers/group_order_invoices_controller.rb
@@ -49,7 +49,7 @@ class GroupOrderInvoicesController < ApplicationController
     gos.each do |go|
       goi = GroupOrderInvoice.find_or_create_by!(group_order_id: go.id)
       goi.invoice_date = invoice_date
-      goi.invoice_number = goi.generate_invoice_number(GroupOrderInvoice, 1)
+      goi.invoice_number = goi.generate_invoice_number(goi, 1)
       goi.save!
     end
     respond_to do |format|
diff --git a/app/controllers/multi_orders_controller.rb b/app/controllers/multi_orders_controller.rb
index 6039e001..f762a72c 100644
--- a/app/controllers/multi_orders_controller.rb
+++ b/app/controllers/multi_orders_controller.rb
@@ -1,21 +1,42 @@
 class MultiOrdersController < ApplicationController
+  include SepaHelper
+
   before_action :set_multi_order, only: [:generate_ordergroup_invoices]
+  
   def create
     orders = Order.where(id: multi_order_params[:order_ids_for_multi_order])
 
     unclosed_orders = orders.select { |order| order.closed? == false }
     multi_orders = orders.select { |order| order.multi_order_id.present? }
+    invoiced_orders = orders.select {|order| order.group_orders.map(&:group_order_invoice).compact.present? }
 
     if multi_order_params[:multi_order_ids_for_multi_multi_order].present?
       #TODO: do the i18n and add a test
-      flash[:alert] = "Du kannst keine Multi-Bestellungen in eine Multi-Multi-Bestellung umwandeln."
-      redirect_to finance_order_index_path
+      msg = "Du kannst keine Multi-Bestellungen in eine Multi-Multi-Bestellung umwandeln."
+      flash[:alert] = msg
+      respond_to do |format|
+        format.js
+        format.html { redirect_to finance_order_index_path }
+      end
       return
     end
     if multi_orders.any? || unclosed_orders.any?
       #TODO: do the i18n and add a test
-      flash[:alert] = "Die Bestellung ist noch nicht abgeschlossen oder ist bereits Teil einer Multi-Bestellung."
-      redirect_to finance_order_index_path
+      msg = "Die Bestellung ist bereits Teil einer Multi-Bestellung oder ist noch nicht abgeschlossen."
+      flash[:alert] = msg
+      respond_to do |format|
+        format.js
+        format.html { redirect_to finance_order_index_path }
+      end
+      return
+    end
+    if invoiced_orders.any?
+      msg = "Zusammenführen nicht möglich. Es gibt bereits Rechnungen für einige der Bestellgruppen."
+      flash[:alert] = msg
+      respond_to do |format|
+        format.js 
+        format.html { redirect_to finance_order_index_path }
+      end
       return
     end
 
@@ -24,15 +45,6 @@ class MultiOrdersController < ApplicationController
       @multi_order.orders = orders
       @multi_order.ends = orders.map(&:ends).max
       @multi_order.save!
-      puts "
-      " + "______________" + "
-      " + "______________" + "
-      " + "______________" + "
-      " + "#{@multi_order.errors.inspect}" + "
-      " + "______________"+ "
-      " + "______________"+ "
-      " + "______________"
-
       #create multi group orders
       all_group_orders = orders.flat_map(&:group_orders)
 
@@ -42,7 +54,6 @@ class MultiOrdersController < ApplicationController
         multi_group_order = MultiGroupOrder.create!(
           multi_order: @multi_order, group_orders: group_orders
         )
-
         # Now, associate each group_order with the new multi_group_order
         group_orders.each do |group_order|
           group_order.update!(multi_group_order: multi_group_order)
@@ -51,9 +62,19 @@ class MultiOrdersController < ApplicationController
       redirect_to finance_order_index_path
     rescue ActiveRecord::RecordInvalid => e
       flash[:alert] = t('errors.general_msg', msg: e.message)
-      redirect_to finance_order_index_path
+      respond_to do |format|
+        format.js
+        format.html { redirect_to finance_order_index_path }
+      end
     end
+  end
 
+  def destroy
+    @multi_order = MultiOrder.find(params[:id])
+    @multi_order.destroy
+    respond_to do |format|
+      format.html { redirect_to finance_order_index_path }
+    end
   end
 
   def generate_ordergroup_invoices
@@ -65,6 +86,77 @@ class MultiOrdersController < ApplicationController
     redirect_to finance_order_index_path, alert: t('errors.general_msg', msg: e.message)
   end
 
+  def collective_direct_debit
+    if foodsoft_sepa_ready?
+      case params[:mode]
+      when 'all'
+        multi_group_orders = MultiGroupOrder.where(multi_order_id: params[:id])
+      when 'selected'
+        #TODO: !!! params and javascript
+        multi_group_orders = MultiGroupOrder.where(id: params[:multi_group_order_ids])
+      else
+        redirect_to finance_order_index_path, alert: I18n.t('orders.collective_direct_debit.alert', ordergroup_names: '')
+      end
+
+      @multi_order = MultiOrder.find(params[:id])
+      ordergroups = multi_group_orders.flat_map(&:group_orders).map(&:ordergroup)
+
+      export_allowed = !ordergroups.map(&:sepa_possible?).include?(false) && !multi_group_orders.map { |go| go.ordergroup_invoice.present? }.include?(false)
+      group_order_ids = multi_group_orders.map { |mgo| mgo.id if mgo.ordergroup_invoice.present? }
+
+      sepa_possible_ordergroup_names = ordergroups.map { |ordergroup| ordergroup.name if ordergroup.sepa_possible? }.compact_blank
+      sepa_not_possible_ordergroup_names = ordergroups.map(&:name) - sepa_possible_ordergroup_names
+
+      if export_allowed && multi_group_orders.present?
+        respond_to do |format|
+          format.html do
+            collective_debit = OrderCollectiveDirectDebitXml.new(multi_group_orders)
+            send_data collective_debit.xml_string, filename: @order.name + '_Sammellastschrift' + '.xml', type: 'text/xml'
+            multi_group_orders.map(&:ordergroup_invoice).each(&:mark_sepa_downloaded)
+          rescue SEPA::Error => e
+            multi_group_orders.map(&:ordergroup_invoice).each(&:unmark_sepa_downloaded)
+            redirect_to finance_order_index_path, alert: e.message
+          rescue StandardError => e
+            multi_group_orders.map(&:ordergroup_invoice).each(&:unmark_sepa_downloaded)
+            redirect_to finance_order_index_path, alert: I18n.t('orders.collective_direct_debit.alert', ordergroup_names: sepa_not_possible_ordergroup_names.join(', '), error: e.message)
+          end
+          format.xml do
+            multi_group_orders.map(&:ordergroup_invoice).each(&:mark_sepa_downloaded)
+            collective_debit = OrderCollectiveDirectDebitXml.new(multi_group_orders)
+            send_data collective_debit.xml_string, filename: @multi_order.orders.first.name + '_Sammellastschrift' + '.xml', type: 'text/xml'
+          rescue SEPA::Error => e
+            multi_group_orders.map(&:ordergroup_invoice).each(&:unmark_sepa_downloaded)
+            render json: { error: e.message }
+          rescue StandardError => e
+            multi_group_orders.map(&:ordergroup_invoice).each(&:unmark_sepa_downloaded)
+            render json: { error: I18n.t('orders.collective_direct_debit.alert', ordergroup_names: sepa_not_possible_ordergroup_names.join(', '), error: e.message) }
+          end
+          format.js
+        end
+      else
+        respond_to do |format|
+          format.html do
+            redirect_to finance_order_index_path, alert: I18n.t('orders.collective_direct_debit.alert', ordergroup_names: sepa_not_possible_ordergroup_names.join(', '), error: '')
+          end
+          format.xml do
+            render json: { error: I18n.t('orders.collective_direct_debit.alert', ordergroup_names: sepa_not_possible_ordergroup_names.join(', '), error: '') }
+          end
+          format.js
+        end
+      end
+    else
+      respond_to do |format|
+        format.html do
+          redirect_to finance_order_index_path, alert: "Wichtige SEPA Konfiguration in Administration >> Einstellungen >> Finanzen nicht gesetzt!"
+        end
+        format.xml do
+          redirect_to finance_order_index_path, alert: "Wichtige SEPA Konfiguration in Administration >> Einstellungen >> Finanzen nicht gesetzt!"
+        end
+        format.js
+      end
+    end
+  end
+
   private
 
   def set_multi_order
@@ -72,6 +164,6 @@ class MultiOrdersController < ApplicationController
   end
 
   def multi_order_params
-    params.permit(:id, order_ids_for_multi_order: [], multi_order_ids_for_multi_multi_order: [])
+    params.permit(:id, :foodcoop, order_ids_for_multi_order: [], multi_order_ids_for_multi_multi_order: [])
   end
 end
diff --git a/app/controllers/ordergroup_invoices_controller.rb b/app/controllers/ordergroup_invoices_controller.rb
index f20b9ce0..edffe596 100644
--- a/app/controllers/ordergroup_invoices_controller.rb
+++ b/app/controllers/ordergroup_invoices_controller.rb
@@ -1,3 +1,4 @@
+
 class OrdergroupInvoicesController < ApplicationController
   include Concerns::SendGroupOrderInvoicePdf
   before_action :authenticate_finance
@@ -27,9 +28,11 @@ class OrdergroupInvoicesController < ApplicationController
   end
 
   def create
-    gos = GroupOrder.where(id: params[:group_order_ids])
+    mgo = MultiGroupOrder.find(params[:multi_group_order_id])
+    @multi_order = mgo.multi_order
     begin
-      OrdergroupInvoice.create!(group_order_ids: gos)
+
+      OrdergroupInvoice.create(multi_group_order_id: mgo.id)
       respond_to do |format|
         format.js
       end
@@ -38,19 +41,139 @@ class OrdergroupInvoicesController < ApplicationController
     end
   end
 
+  def destroy
+    oi = OrdergroupInvoice.find(params[:id])
+    @multi_order = oi.multi_group_order.multi_order
+    oi.destroy
+    respond_to do |format|
+      format.js
+      format.json { head :no_content }
+    end
+  end
+
   def create_multiple
-    invoice_date = params[:ordergroup_invoce][:invoice_date]
-    multi_order_id = params[:ordergroup_invoce][:multi_order_id]
+    invoice_date = params[:ordergroup_invoice][:invoice_date]
+    multi_order_id = params[:ordergroup_invoice][:multi_order_id]
     @multi_order = MultiOrder.find(multi_order_id)
     multi_group_orders = MultiGroupOrder.where("multi_order_id = ?", multi_order_id)
-    mutli_group_orders.each do |multi_group_order|
+    multi_group_orders.each do |multi_group_order|
       ordergroup_invoice = OrdergroupInvoice.find_or_create_by!(multi_group_order: multi_group_order)
       ordergroup_invoice.invoice_date = invoice_date
-      ordergroup_invoice.invoice_number = ordergroup_invoice.generate_invoice_number(OrdergroupInvoice, 1)
+      ordergroup_invoice.invoice_number = ordergroup_invoice.generate_invoice_number(ordergroup_invoice, 1)
       ordergroup_invoice.save!
     end
     respond_to do |format|
       format.js
     end
   end
+
+
+  def select_sepa_sequence_type
+    @ordergroup_invoice = OrdergroupInvoice.find(params[:id])
+    @multi_group_order = @ordergroup_invoice.multi_group_order
+    return unless params[:sepa_sequence_type]
+
+    respond_to do |format|
+      @ordergroup_invoice.sepa_sequence_type = params[:sepa_sequence_type]
+      if @ordergroup_invoice.save!
+        format.js
+      else
+        format.json { render json: @ordergroup_invoice.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  def select_all_sepa_sequence_type
+    @multi_order= MultiOrder.find(params[:multi_order_id])
+    @ordergroup_invoices = @multi_order.multi_group_orders.map(&:ordergroup_invoice).compact
+    return unless params[:sepa_sequence_type]
+    @sepa_sequence_type = params[:sepa_sequence_type]
+    @ordergroup_invoices.each do |oi|
+      oi.sepa_sequence_type = params[:sepa_sequence_type]
+      oi.save!
+    end
+    respond_to do |format|
+      format.js
+    end
+  end
+
+  def toggle_paid
+    @ordergroup_invoice = OrdergroupInvoice.find(params[:id])
+    respond_to do |format|
+      @ordergroup_invoice.paid = !@ordergroup_invoice.paid
+      if @ordergroup_invoice.save!
+        format.js
+      else
+        format.json { render json: @ordergroup_invoice.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  def toggle_sepa_downloaded
+    @ordergroup_invoice = OrdergroupInvoice.find(params[:id])
+    @multi_order= @ordergroup_invoice.multi_group_order.multi_order
+    respond_to do |format|
+      @ordergroup_invoice.sepa_downloaded = !@ordergroup_invoice.sepa_downloaded
+      if @ordergroup_invoice.save!
+        format.js
+      else
+        format.json { render json: @ordergroup_invoice.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  def toggle_all_paid
+    @multi_order= MultiOrder.find(params[:multi_order_id])
+    @ordergroup_invoices = @multi_order.multi_group_orders.map(&:ordergroup_invoice).compact
+    @ordergroup_invoices.each do |oi|
+      oi.paid = !ActiveRecord::Type::Boolean.new.deserialize(params[:paid])
+      oi.save!
+    end
+    respond_to do |format|
+      format.js
+    end
+  end
+
+  def toggle_all_sepa_downloaded
+    @multi_order= MultiOrder.find(params[:multi_order_id])
+    @ordergroup_invoices = @multi_order.multi_group_orders.map(&:ordergroup_invoice).compact
+    @ordergroup_invoices.each do |goi|
+      goi.sepa_downloaded = !ActiveRecord::Type::Boolean.new.deserialize(params[:sepa_downloaded])
+      goi.save!
+    end
+    respond_to do |format|
+      format.js
+    end
+  end
+
+  def download_all
+    multi_order = MultiOrder.find(params[:multi_order_id])
+
+    invoices = multi_order.multi_group_orders.map(&:ordergroup_invoice)
+    pdf = {}
+    file_paths = []
+    temp_file = Tempfile.new("all_invoices_for_multi_order_#{multi_order.id}.zip")
+    Zip::File.open(temp_file.path, Zip::File::CREATE) do |zipfile|
+      invoices.each do |invoice|
+        pdf = create_invoice_pdf(invoice)
+        file_path = File.join("tmp", pdf.filename)
+        File.open(file_path, 'w:ASCII-8BIT') do |file|
+          file.write(pdf.to_pdf)
+        end
+        file_paths << file_path
+        zipfile.add(pdf.filename, file_path) unless zipfile.find_entry(pdf.filename)
+      end
+    end
+
+    zip_data = File.read(temp_file.path)
+    file_paths.each do |file_path|
+      File.delete(file_path)
+    end
+    respond_to do |format|
+      format.html do
+        send_data(zip_data, type: 'application/zip', filename: "#{l multi_order.ends, format: :file}-#{multi_order.orders.first.supplier.name}-#{multi_order.id}.zip", disposition: 'attachment')
+      end
+    end
+  end
+
 end
diff --git a/app/documents/group_order_invoice_pdf.rb b/app/documents/group_order_invoice_pdf.rb
index b2b149a5..52ea0b38 100644
--- a/app/documents/group_order_invoice_pdf.rb
+++ b/app/documents/group_order_invoice_pdf.rb
@@ -11,7 +11,7 @@ class GroupOrderInvoicePdf < RenderPdf
   def body
     contact = FoodsoftConfig[:contact].symbolize_keys
     ordergroup = @options[:ordergroup]
-
+    # TODO: group_by supplier, sort alphabetically
     # From paragraph
     bounding_box [margin_box.right - 200, margin_box.top - 20], width: 200 do
       text I18n.t('documents.group_order_invoice_pdf.invoicer')
@@ -69,8 +69,6 @@ class GroupOrderInvoicePdf < RenderPdf
 
     #------------- Table Data -----------------------
 
-    @group_order = GroupOrder.find(@options[:group_order].id)
-
     if FoodsoftConfig[:group_order_invoices][:vat_exempt]
       body_for_vat_exempt
     else
@@ -82,7 +80,8 @@ class GroupOrderInvoicePdf < RenderPdf
     total_gross = 0
     data = [I18n.t('documents.group_order_invoice_pdf.vat_exempt_rows')]
     move_down 10
-    group_order_articles = GroupOrderArticle.where(group_order_id: @group_order.id)
+    # no sinle group_order_id, capice? get all the articles.
+    group_order_articles = GroupOrderArticle.where(group_order_ids: @options.group_order_ids)
     separate_deposits = FoodsoftConfig[:group_order_invoices]&.[](:separate_deposits)
     group_order_articles.each do |goa|
       # if no unit is received, nothing is to be charged
@@ -173,7 +172,7 @@ class GroupOrderInvoicePdf < RenderPdf
            else
              [I18n.t('documents.group_order_invoice_pdf.price_markup_rows', marge: marge)]
            end
-    goa_tax_hash = GroupOrderArticle.where(group_order_id: @group_order.id).find_each.group_by { |oat| oat.order_article.price.tax }
+    goa_tax_hash = GroupOrderArticle.where(group_order_id: @options[:group_order_ids]).find_each.group_by { |oat| oat.order_article.price.tax }
     goa_tax_hash.each do |tax, group_order_articles|
       group_order_articles.each do |goa|
         # if no unit is received, nothing is to be charged
diff --git a/app/models/group_order.rb b/app/models/group_order.rb
index 6dbc8d09..2045ac12 100644
--- a/app/models/group_order.rb
+++ b/app/models/group_order.rb
@@ -11,7 +11,7 @@ class GroupOrder < ApplicationRecord
   has_one :financial_transaction
   has_one :group_order_invoice
   belongs_to :ordergroup_invoice, optional: true
-  belongs_to :multi_group_order, optional: true
+  belongs_to :multi_group_order, optional: true, dependent: :destroy
   belongs_to :multi_order, optional: true
   belongs_to :updated_by, optional: true, class_name: 'User', foreign_key: 'updated_by_user_id'
 
diff --git a/app/models/multi_group_order.rb b/app/models/multi_group_order.rb
index 9cba7466..9cb89aad 100644
--- a/app/models/multi_group_order.rb
+++ b/app/models/multi_group_order.rb
@@ -1,21 +1,21 @@
 class MultiGroupOrder < ApplicationRecord
   belongs_to :multi_order
-  has_many :group_orders, dependent: :nullify
-
-  after_destroy :delete_ordergroup_invoices
-
-  def ordergroup_invoice
-    #TODO: delete if deleted
-    group_orders.joins(:ordergroup_invoice).first&.ordergroup_invoice
-  end
+  has_many :group_orders
+  has_one :ordergroup_invoice, dependent: :destroy
 
   def ordergroup
-    ordergroup_invoice&.ordergroup
+    group_orders.first&.ordergroup
   end
 
-  private
+  def price
+    group_orders.map(&:price).sum
+  end
 
-  def delete_ordergroup_invoices
-    ordergroup_invoice&.destroy
+  def group_order_invoice
+    ordergroup_invoice
+  end
+
+  def order
+    multi_order
   end
 end
diff --git a/app/models/multi_order.rb b/app/models/multi_order.rb
index f17eaa67..c6ab683f 100644
--- a/app/models/multi_order.rb
+++ b/app/models/multi_order.rb
@@ -2,9 +2,10 @@ class MultiOrder < ApplicationRecord
   has_many :orders, dependent: :nullify
   has_many :order_articles, through: :orders
   has_many :multi_group_orders, dependent: :destroy
+
+  #TODO: diese association lösen
   has_many :group_orders, through: :multi_group_orders
-  has_many :ordergroups, through: :group_orders
-  #TODO: wenn groupOrderInvoice existiert, dann fehler schmeißen..
+  # has_many :ordergroups, through: :group_orders
   has_many :ordergroup_invoices, through: :group_orders
 
   #make sure order has no multi_order_id
@@ -33,6 +34,11 @@ class MultiOrder < ApplicationRecord
     orders.map(&:foodcoop_result).compact_blank.sum
   end
 
+  def supplier
+    #todo: who is this?
+    orders.map(&:supplier).compact.first
+  end
+  
   private
   def check_orders
     orders.each do |order|
diff --git a/app/models/ordergroup_invoice.rb b/app/models/ordergroup_invoice.rb
index 15b99728..02eda363 100644
--- a/app/models/ordergroup_invoice.rb
+++ b/app/models/ordergroup_invoice.rb
@@ -3,16 +3,27 @@ class OrdergroupInvoice < ApplicationRecord
 
   belongs_to :multi_group_order, optional: true
 
-  has_many :group_orders, dependent: :nullify
+  # has_many :group_orders, through: :multi_group_order, dependent: :nullify
+
   validates_presence_of :invoice_number
   validates_uniqueness_of :invoice_number
   validate :tax_number_set
   after_initialize :init, unless: :persisted?
 
+  # accepts_nested_attributes_for :group_orders, :multi_group_order
+
+
+  enum sequence_type: {
+    FRST: "Erst-Lastschrift",
+    RCUR: "Folge-Lastschrift",
+    OOFF: "Einmalige Lastschrift",
+    FNAL: "Letztmalige Lastschrift"
+  }
+
   def init
     self.invoice_date = Time.now unless invoice_date
     self.invoice_number = generate_invoice_number(self, 1) unless self.invoice_number
-    self.payment_method = group_orders.first&.financial_transaction&.financial_transaction_type&.name || FoodsoftConfig[:group_order_invoices]&.[](:payment_method) || I18n.t('activerecord.attributes.group_order_invoice.payment_method') unless self.payment_method
+    self.payment_method = multi_group_order.group_orders.first&.financial_transaction&.financial_transaction_type&.name || FoodsoftConfig[:ordergroup_invoices]&.[](:payment_method) || I18n.t('activerecord.attributes.ordergroup_invoice.payment_method') unless self.payment_method
   end
 
   def ordergroup
@@ -27,13 +38,26 @@ class OrdergroupInvoice < ApplicationRecord
     errors.add(:cumulative_invoice, "Keine Steuernummer in FoodsoftConfig :contact gesetzt")
   end
 
+  def mark_sepa_downloaded
+    self.sepa_downloaded = true
+    self.save
+  end
+
+  def unmark_sepa_downloaded
+    self.sepa_downloaded = false
+    self.save
+  end
+
   def name
-    I18n.t('activerecord.attributes.group_order_invoice.name') + "_#{invoice_number}"
+    I18n.t('activerecord.attributes.ordergroup_invoice.name') + "_#{invoice_number}"
   end
 
   def load_data_for_invoice
     invoice_data = {}
+    group_orders = multi_group_order.group_orders
     order = group_orders.map(&:order).first
+    #how to define one order?
+    
     invoice_data[:pickup] = order.pickup
     invoice_data[:supplier] = order.supplier&.name
     invoice_data[:ordergroup] = group_orders.first.ordergroup
diff --git a/app/views/finance/balancing/_multi_order_row.html.haml b/app/views/finance/balancing/_multi_order_row.html.haml
index 5228eb1a..5fa1474b 100644
--- a/app/views/finance/balancing/_multi_order_row.html.haml
+++ b/app/views/finance/balancing/_multi_order_row.html.haml
@@ -1,6 +1,5 @@
 %tr{:class => cycle("even","odd", :name => "multi_order"), 'data-multi_order_id' => multi_order.id}
   %td
-    = check_box_tag "multi_order_ids_for_multi_multi_order[]", multi_order.id, false, class: "multi_order-checkbox", id: "multi_order_#{multi_order.id}_combine", data: { multi_order_id: multi_order.id }
   %td
     = "*Multi*"
     -multi_order.orders.each do |order|
@@ -9,14 +8,19 @@
   %td=h format_time(multi_order.ends) unless multi_order.ends.nil?
   %td= multi_order.closed? ? t('finance.balancing.orders.cleared', amount: number_to_currency(multi_order.foodcoop_result)) : t('finance.balancing.orders.ended')
   %td= show_user(multi_order.updated_by)
-  %td{id: "group-multi_order-invoices-for-multi-order-#{multi_order.id}", class: 'expand-trigger'}
+  %td{id: "group-multi_order-invoices-for-multi-order-#{multi_order.id}"}
     - if multi_order.closed?
-      -if FoodsoftConfig[:contact][:tax_number] && multi_order.group_orders.present?
-        = link_to I18n.t('activerecord.attributes.group_order_invoice.open_details_modal'), "#", remote: true, class: 'btn btn-small'
+      -if FoodsoftConfig[:contact][:tax_number] && multi_order.multi_group_orders.present?
+        = link_to I18n.t('activerecord.attributes.group_order_invoice.open_details_modal'), "#", remote: true, class: 'btn btn-small expand-trigger'
       -else
         = I18n.t('activerecord.attributes.group_order_invoice.tax_number_not_set')
     - else
       = t('orders.index.not_closed')
-%tr{:class => 'expanded-row', :id => "expanded-row-#{multi_order.id}", :style => 'display: none;'}
-  %td{:colspan => '6'}
+  %td
+    = link_to multi_order, method: :delete, data: { confirm: I18n.t('ui.confirm_delete', name: "Multi Bestellung #{multi_order.name}" ) } do
+      Multi Bestellung auflösen
+      %i.icon-remove
+        
+%tr{:class => 'expanded-row hidden', :id => "expanded-multi-row-#{multi_order.id}"}
+  %td{:colspan => '7'}
     = render partial: 'ordergroup_invoices/modal', locals: { multi_order: multi_order }
\ No newline at end of file
diff --git a/app/views/finance/balancing/_order_row.html.haml b/app/views/finance/balancing/_order_row.html.haml
index 39900bcf..be95c1fd 100644
--- a/app/views/finance/balancing/_order_row.html.haml
+++ b/app/views/finance/balancing/_order_row.html.haml
@@ -5,10 +5,10 @@
   %td=h format_time(order.ends) unless order.ends.nil?
   %td= order.closed? ? t('finance.balancing.orders.cleared', amount: number_to_currency(order.foodcoop_result)) : t('finance.balancing.orders.ended')
   %td= show_user(order.updated_by)
-  %td{id: "group-order-invoices-for-order-#{order.id}", class: 'expand-trigger'}
+  %td{id: "group-order-invoices-for-order-#{order.id}"}
     - if order.closed?
       -if FoodsoftConfig[:contact][:tax_number] && order.ordergroups.present?
-        = link_to I18n.t('activerecord.attributes.group_order_invoice.open_details_modal'), "#", remote: true, class: 'btn btn-small'
+        = link_to I18n.t('activerecord.attributes.group_order_invoice.open_details_modal'), "#", remote: true, class: 'btn btn-small expand-trigger'
       -else
         = I18n.t('activerecord.attributes.group_order_invoice.tax_number_not_set')
     - else
@@ -21,6 +21,6 @@
         - else
           = link_to t('orders.index.action_receive'), '#', class: 'btn btn-small disabled'
       = link_to t('finance.balancing.orders.clear'), new_finance_order_path(order_id: order.id), class: 'btn btn-small btn-primary'
-%tr{:class => 'expanded-row', :id => "expanded-row-#{order.id}", :style => 'display: none;'}
+%tr{:class => 'expanded-row hidden', :id => "expanded-row-#{order.id}"}
   %td{:colspan => '7'}
     = render partial: 'group_order_invoices/modal', locals: { order: order }
\ No newline at end of file
diff --git a/app/views/finance/balancing/_orders.html.haml b/app/views/finance/balancing/_orders.html.haml
index 267a9847..52b08f62 100644
--- a/app/views/finance/balancing/_orders.html.haml
+++ b/app/views/finance/balancing/_orders.html.haml
@@ -1,27 +1,24 @@
-- unless @orders.empty? && @multi_orders.empty?
+- unless @results.empty?
   - if Order.finished.count > 20
     = items_per_page
-  = pagination_links_remote @orders
-  -# following posed a real problem, multiple submit buttons are within the same form, so only one of them will be submitted
-  -# convert to javascript
-  = form_with url: multi_orders_path, method: :post, local: true do |form|
-    %table.table.table-striped
-      %thead
-        %tr
-          %th=I18n.t('activerecord.attributes.group_order_invoice.links.combine')
-          %th= t('.name')
-          %th= t('.end')
-          %th= t('.state')
-          %th= heading_helper Order, :updated_by
-          %th= heading_helper GroupOrderInvoice,  :name
-          %th
-          %th
-      %tbody
-        - @multi_orders.each do |multi_order|
-          = render partial: 'multi_order_row', locals: { multi_order: multi_order }
-        - @orders.each do |order|
-          = render partial: 'order_row', locals: { order: order }
-    = form.submit "Zusammenführen", class: 'btn btn-primary'
+  %table.table.table-striped
+    %thead
+      %tr
+        %th=I18n.t('activerecord.attributes.group_order_invoice.links.combine')
+        %th= t('.name')
+        %th= t('.end')
+        %th= t('.state')
+        %th= heading_helper Order, :updated_by
+        %th= heading_helper GroupOrderInvoice,  :name
+        %th
+        %th
+    %tbody
+      - @results.each do |result|
+        - if result.class == Order
+          = render partial: 'order_row', locals: { order: result }
+        - else
+          = render partial: 'multi_order_row', locals: { multi_order: result }
+  = button_tag 'Zusammenführen', class: 'btn btn-primary merge-orders-btn', type: 'button', data: { url: multi_orders_path }
 
 - else
   %i= t('.no_closed_orders')
diff --git a/app/views/finance/balancing/index.js.haml b/app/views/finance/balancing/index.js.haml
index d344fb68..7204a2b7 100644
--- a/app/views/finance/balancing/index.js.haml
+++ b/app/views/finance/balancing/index.js.haml
@@ -5,7 +5,11 @@ $('#ordersTable').html('#{j(render('orders'))}');
     var orderId = $(this).closest('tr').data('order_id');
     var expandedRow = $('#expanded-row-' + orderId);
     // Toggle visibility of the expanded row
-    expandedRow.slideToggle();
+    expandedRow.toggleClass('hidden');
+    
+    tableRow.toggleClass('border');
+    expandedRow.toggleClass('bordered');
+    
     return false; // Prevent the default behavior of the link
   });
 
diff --git a/app/views/group_order_invoices/_links.html.haml b/app/views/group_order_invoices/_links.html.haml
index 70ca78e4..bb091bb0 100644
--- a/app/views/group_order_invoices/_links.html.haml
+++ b/app/views/group_order_invoices/_links.html.haml
@@ -5,7 +5,7 @@
   - if go.group_order_invoice.present?
     - show_generate_with_date = false
 - if show_generate_with_date
-  = form_for :group_order_invoice, url: url_for('group_order_invoice#create_multiple'), remote: true do |f|
+  = form_for :group_order_invoice, url: finance_group_order_invoice_path(foodcoop: FoodsoftConfig[:default_scope], protocol: :https), remote: true do |f|
     = f.label :invoice_date, I18n.t('activerecord.attributes.group_order_invoice.links.invoice_date')
     = f.date_field :invoice_date, {value: Date.today, max: Date.today, required: true}
     = f.hidden_field :order_id, value: order.id
@@ -37,6 +37,8 @@
                 =render :partial => 'group_order_invoices/select_sepa_sequence_type', locals:{ group_order_invoice: go.group_order_invoice, group_order: go }
             %td
               = check_box_tag "group_order_ids_for_order_#{order.id}", go.id, false, class: "group-order-checkbox", id: "group_order_#{go.id}_included_in_sepa", data: { order_id: go.id }
+            %td
+              %b= go.group_order_invoice.invoice_number
             %td
               = link_to I18n.t('activerecord.attributes.group_order_invoice.links.download'), group_order_invoice_path(go.group_order_invoice, :format => 'pdf'), class: 'btn btn-block'
               = link_to  I18n.t('activerecord.attributes.group_order_invoice.links.delete'), go.group_order_invoice, method: :delete, class: 'btn btn-block btn-danger', remote: true, data: { confirm: I18n.t('ui.confirm_delete', name: "Bestellgruppenrechnung für #{go.ordergroup.name}" ) }
diff --git a/app/views/group_order_invoices/create_multiple.js.erb b/app/views/group_order_invoices/create_multiple.js.erb
index 9b29c466..5e29c1cb 100644
--- a/app/views/group_order_invoices/create_multiple.js.erb
+++ b/app/views/group_order_invoices/create_multiple.js.erb
@@ -1,2 +1 @@
-
 $("#order_<%= @order.id %>_modal").html("<%= escape_javascript(render partial: 'links', locals: {order: @order}) %>");
diff --git a/app/views/ordergroup_invoices/_collective_direct_debit.html.haml b/app/views/ordergroup_invoices/_collective_direct_debit.html.haml
new file mode 100644
index 00000000..4241d7b1
--- /dev/null
+++ b/app/views/ordergroup_invoices/_collective_direct_debit.html.haml
@@ -0,0 +1,8 @@
+- if foodsoft_sepa_ready?
+  = link_to 'Sammellastschrift für alle (.xml)', collective_direct_debit_multi_order_path(id: multi_order.id, mode: 'all'), class: 'btn btn-block', data: { turbolinks: false, multi_order_id: multi_order.id, supplier: FoodsoftConfig[:name] }, id: "collective-direct-debit-link-all-#{multi_order.id}"
+  = link_to 'Sammellastschrift für ausgewählt (.xml)', collective_direct_debit_multi_order_path(id: multi_order.id, mode: 'selected'), class: 'btn btn-block', data: { turbolinks: false, multi_order_id: multi_order.id, supplier: FoodsoftConfig[:name] }, id: "collective-direct-debit-link-selected-#{multi_order.id}"
+- else
+  %i
+    = t('activerecord.attributes.group_order_invoice.links.sepa_not_ready')
+
+-# solve hotfix: multi_order.orders.first.supplier&.name
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/_links.html.haml b/app/views/ordergroup_invoices/_links.html.haml
index de58374e..5153b362 100644
--- a/app/views/ordergroup_invoices/_links.html.haml
+++ b/app/views/ordergroup_invoices/_links.html.haml
@@ -5,7 +5,7 @@
   - if mgo.ordergroup_invoice.present?
     - show_generate_with_date = false
 - if show_generate_with_date
-  = form_for :ordergroup_invoice, url: url_for('ordergroup_invoice#create_multiple'), remote: true do |f|
+  = form_for :ordergroup_invoice, url: finance_ordergroup_invoice_path(foodcoop: FoodsoftConfig[:default_scope], protocol: :https), remote: true do |f|
     = f.label :invoice_date, I18n.t('activerecord.attributes.group_order_invoice.links.invoice_date')
     = f.date_field :invoice_date, {value: Date.today, max: Date.today, required: true}
     = f.hidden_field :multi_order_id, value: multi_order.id
@@ -20,52 +20,55 @@
       %th=I18n.t('activerecord.attributes.group_order_invoice.links.sepa_downloaded')
       %th=I18n.t('activerecord.attributes.group_order_invoice.links.sepa_sequence_type')
       %th=I18n.t('activerecord.attributes.group_order_invoice.links.sepa_select')
+      %th=I18n.t('activerecord.attributes.group_order_invoice.links.invoice_number')
       %th
   %tbody
     - multi_order.multi_group_orders.each do |mgo|
       -if mgo.ordergroup_invoice.present?
         - if mgo.ordergroup_invoice
-          = mgo.ordergroup_invoice.invoice_number
           %tr.order-row{id: "multi_group_order_#{mgo.id}"}
-            %td= link_to mgo.ordergroup&.name, edit_admin_ordergroup_path(mgo.ordergroup)
             %td
+              = link_to mgo.ordergroup&.name, edit_admin_ordergroup_path(mgo.ordergroup)
+            %td
+              .div{id: "paid_multi_#{mgo.ordergroup_invoice.id}"}
+                = render :partial => "ordergroup_invoices/toggle_paid", locals: { ordergroup_invoice: mgo.ordergroup_invoice }
+            %td
+              .div{id: "sepa_downloaded_multi_#{mgo.ordergroup_invoice.id}"}
+                = render :partial => "ordergroup_invoices/toggle_sepa_downloaded", locals: { ordergroup_invoice: mgo.ordergroup_invoice }
+            %td
+              .div{id: "select_sepa_sequence_type_multi_#{mgo.ordergroup_invoice.id}"}
+                =render :partial => 'ordergroup_invoices/select_sepa_sequence_type', locals:{ ordergroup_invoice: mgo.ordergroup_invoice, multi_group_order: mgo }
+            %td
+              = check_box_tag "group_order_ids_for_multi_order_#{multi_order.id}", mgo.id, false, class: "group-order-checkbox", id: "group_order_#{mgo.id}_included_in_sepa", data: { multi_group_order_id: mgo.id }
+            %td
+              %b= mgo.ordergroup_invoice.invoice_number
+            %td
+              = link_to  I18n.t('activerecord.attributes.group_order_invoice.links.delete'), mgo.ordergroup_invoice, method: :delete, class: 'btn btn-block btn-danger', remote: true, data: { confirm: I18n.t('ui.confirm_delete', name: "Bestellgruppenrechnung für #{mgo.ordergroup.name}" ) }
               = link_to I18n.t('activerecord.attributes.group_order_invoice.links.download'), ordergroup_invoice_path(mgo.ordergroup_invoice, :format => 'pdf'), class: 'btn btn-block'
-    -#           .div{id: "paid_#{mgo.ordergroup_invoice.id}"}
-    -#             = render :partial => "group_order_invoices/toggle_paid", locals: { group_order_invoice: go.group_order_invoice }
-    -#         %td
-    -#           .div{id: "sepa_downloaded_#{go.group_order_invoice.id}"}
-    -#             = render :partial => "group_order_invoices/toggle_sepa_downloaded", locals: { group_order_invoice: go.group_order_invoice }
-    -#         %td
-    -#           .div{id: "select_sepa_sequence_type_#{go.group_order_invoice.id}"}
-    -#             =render :partial => 'group_order_invoices/select_sepa_sequence_type', locals:{ group_order_invoice: go.group_order_invoice, group_order: go }
-    -#         %td
-    -#           = check_box_tag "group_order_ids_for_order_#{multi_order.id}", go.id, false, class: "group-order-checkbox", id: "group_order_#{go.id}_included_in_sepa", data: { order_id: go.id }
-    -#           = link_to  I18n.t('activerecord.attributes.group_order_invoice.links.delete'), go.group_order_invoice, method: :delete, class: 'btn btn-block btn-danger', remote: true, data: { confirm: I18n.t('ui.confirm_delete', name: "Bestellgruppenrechnung für #{go.ordergroup.name}" ) }
-    -#     - else
-    -#       %tr
-    -#         %td
-    -#           = go.ordergroup&.name
-    -#           = button_to I18n.t('activerecord.attributes.group_order_invoice.links.generate'), group_order_invoices_path(:method => :post, group_order: go) ,class: 'btn btn-small', params: {id: multi_order.id}, remote: true
-    -#         %td
-    -#         %td
-    -#         %td
-    -#         %td
-    -#         %td
-
-    -# - if multi_order.group_orders.map(&:group_order_invoice).compact.present?
-    -#   %tr.order-row
-    -#     %td= I18n.t('activerecord.attributes.group_order_invoice.links.actions_for_all')
-    -#     %td
-    -#       .div{id: "toggle_all_paid_#{multi_order.id}"}
-    -#         = render :partial => 'group_order_invoices/toggle_all_paid', locals: { order: order }
-    -#     %td
-    -#       .div{id: "toggle_all_sepa_downloaded_#{multi_order.id}"}
-    -#         = render :partial => 'group_order_invoices/toggle_all_sepa_downloaded', locals: { order: order }
-    -#     %td
-    -#       .div{id: "select_all_sepa_sequence_type_#{multi_order.id}"}
-    -#         = render :partial => 'group_order_invoices/select_all_sepa_sequence_type', locals: { order: multi_order }
-    -#     %td
-    -#       .div{id: "select_all_sepa_#{multi_order.id}"}
-    -#         = render :partial => 'group_order_invoices/collective_direct_debit', locals: { order: multi_order }
-    -#     %td
-    -#       = link_to I18n.t('activerecord.attributes.group_order_invoice.links.download_all_zip'), download_all_group_order_invoices_path(multi_order), class: 'btn btn-block'
+      - else
+        %tr
+          %td
+            = mgo.group_orders.first.ordergroup&.name
+            = button_to I18n.t('activerecord.attributes.group_order_invoice.links.generate'), ordergroup_invoices_path(:method => :post, multi_group_order_id: mgo) ,class: 'btn btn-small', remote: true
+          %td
+          %td
+          %td
+          %td
+          %td
+    - if multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.present?
+      %tr.order-row
+        %td= I18n.t('activerecord.attributes.group_order_invoice.links.actions_for_all')
+        %td
+          .div{id: "toggle_all_paid_multi_#{multi_order.id}"}
+            = render :partial => 'ordergroup_invoices/toggle_all_paid', locals: { multi_order: multi_order }
+        %td
+          .div{id: "toggle_all_sepa_downloaded_multi_#{multi_order.id}"}
+            = render :partial => 'ordergroup_invoices/toggle_all_sepa_downloaded', locals: { multi_order: multi_order }
+        %td
+          .div{id: "select_all_sepa_sequence_type_multi_#{multi_order.id}"}
+            = render :partial => 'ordergroup_invoices/select_all_sepa_sequence_type', locals: { multi_order: multi_order }
+        %td
+          .div{id: "select_all_sepa_#{multi_order.id}"}
+            = render :partial => 'ordergroup_invoices/collective_direct_debit', locals: { multi_order: multi_order }
+        %td
+          = link_to I18n.t('activerecord.attributes.group_order_invoice.links.download_all_zip'), download_all_ordergroup_invoices_path(multi_order), class: 'btn btn-block'
diff --git a/app/views/ordergroup_invoices/_select_all_sepa_sequence_type.html.haml b/app/views/ordergroup_invoices/_select_all_sepa_sequence_type.html.haml
new file mode 100644
index 00000000..a4dc9580
--- /dev/null
+++ b/app/views/ordergroup_invoices/_select_all_sepa_sequence_type.html.haml
@@ -0,0 +1,2 @@
+= link_to select_all_sepa_sequence_type_ordergroup_invoices_path(multi_order_id: multi_order.id), remote: true, method: :patch, class: "ajax-update-all-link-#{multi_order.id}" , data: { turbolinks: false } do
+  = select_tag 'sepa_sequence_type', options_for_select(OrdergroupInvoice.sequence_types.keys.map { |st| [I18n.t("activerecord.attributes.group_order_invoice.sequence_type.#{st}"), st] }, selected: @sequence_type || multi_order.multi_group_orders.map(&:ordergroup_invoice)&.compact&.first&.sepa_sequence_type), class: 'form-control', id: "all_sepa_sequence_type_multi_#{multi_order.id}"
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/_select_sepa_sequence_type.html.haml b/app/views/ordergroup_invoices/_select_sepa_sequence_type.html.haml
new file mode 100644
index 00000000..61799883
--- /dev/null
+++ b/app/views/ordergroup_invoices/_select_sepa_sequence_type.html.haml
@@ -0,0 +1,2 @@
+= link_to select_sepa_sequence_type_ordergroup_invoice_path(ordergroup_invoice), remote: true, method: :patch, class: "ajax-update-link-#{multi_group_order.id}", data: { turbolinks: false } do
+  = select_tag 'sepa_sequence_type', options_for_select(OrdergroupInvoice.sequence_types.keys.map { |st| [I18n.t("activerecord.attributes.group_order_invoice.sequence_type.#{st}"), st] }, selected: ordergroup_invoice.sepa_sequence_type ), class: 'form-control', id: "sepa_sequence_type_multi_#{multi_group_order.id}"
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/_toggle_all_paid.html.haml b/app/views/ordergroup_invoices/_toggle_all_paid.html.haml
new file mode 100644
index 00000000..9cb1817f
--- /dev/null
+++ b/app/views/ordergroup_invoices/_toggle_all_paid.html.haml
@@ -0,0 +1,2 @@
+= link_to toggle_all_paid_ordergroup_invoices_path(multi_order_id: multi_order.id, paid: multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.map(&:paid)&.all? ), remote: true, method: :patch, data: { confirm: I18n.t('ui.confirm_mark_all', name: multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.map(&:paid)&.all? ? I18n.t('activerecord.attributes.group_order_invoice.links.not_paid'): I18n.t('activerecord.attributes.group_order_invoice.links.paid') ) } do
+  = check_box_tag :paid, '1', multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.map(&:paid)&.all? , class: 'form-check-input', id: "paid_all_multi_#{multi_order.id}"
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/_toggle_all_sepa_downloaded.html.haml b/app/views/ordergroup_invoices/_toggle_all_sepa_downloaded.html.haml
new file mode 100644
index 00000000..ff212377
--- /dev/null
+++ b/app/views/ordergroup_invoices/_toggle_all_sepa_downloaded.html.haml
@@ -0,0 +1,2 @@
+= link_to toggle_all_sepa_downloaded_ordergroup_invoices_path(multi_order_id: multi_order.id, sepa_downloaded: multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.map(&:sepa_downloaded)&.all? ), remote: true, method: :patch, data: { confirm: I18n.t('ui.confirm_mark_all', name:  multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.map(&:sepa_downloaded)&.all? ? I18n.t('activerecord.attributes.group_order_invoice.links.sepa_not_downloaded') : I18n.t('activerecord.attributes.group_order_invoice.links.sepa_downloaded')) } do
+  = check_box_tag :sepa_downloaded, '1', multi_order.multi_group_orders.map(&:ordergroup_invoice).compact.map(&:sepa_downloaded)&.all? , class: 'form-check-input', id: "sepa_downloaded_all_multi_#{multi_order.id}"
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/_toggle_paid.html.haml b/app/views/ordergroup_invoices/_toggle_paid.html.haml
new file mode 100644
index 00000000..4d2715d6
--- /dev/null
+++ b/app/views/ordergroup_invoices/_toggle_paid.html.haml
@@ -0,0 +1,2 @@
+= link_to toggle_paid_ordergroup_invoice_path(ordergroup_invoice), remote: true, method: :patch, data: { turbolinks: false }  do
+  = check_box_tag 'paid', '1', ordergroup_invoice.paid , class: 'form-check-input', id: "paid_multi_#{ordergroup_invoice.id}"
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/_toggle_sepa_downloaded.html.haml b/app/views/ordergroup_invoices/_toggle_sepa_downloaded.html.haml
new file mode 100644
index 00000000..f4bfcbd1
--- /dev/null
+++ b/app/views/ordergroup_invoices/_toggle_sepa_downloaded.html.haml
@@ -0,0 +1,2 @@
+= link_to toggle_sepa_downloaded_ordergroup_invoice_path(ordergroup_invoice), remote: true, method: :patch do
+  = check_box_tag 'sepa_downloaded', '1', ordergroup_invoice.sepa_downloaded , class: 'form-check-input', id: "sepa_downloaded_multii_#{ordergroup_invoice.id}"
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/create.js.erb b/app/views/ordergroup_invoices/create.js.erb
new file mode 100644
index 00000000..bb012a28
--- /dev/null
+++ b/app/views/ordergroup_invoices/create.js.erb
@@ -0,0 +1 @@
+$("#multi_order_<%= @multi_order.id %>_modal").html("<%= escape_javascript(render partial: 'links', locals: {multi_order: @multi_order}) %>");
diff --git a/app/views/ordergroup_invoices/create_multiple.js.erb b/app/views/ordergroup_invoices/create_multiple.js.erb
new file mode 100644
index 00000000..bb012a28
--- /dev/null
+++ b/app/views/ordergroup_invoices/create_multiple.js.erb
@@ -0,0 +1 @@
+$("#multi_order_<%= @multi_order.id %>_modal").html("<%= escape_javascript(render partial: 'links', locals: {multi_order: @multi_order}) %>");
diff --git a/app/views/ordergroup_invoices/destroy.js.erb b/app/views/ordergroup_invoices/destroy.js.erb
new file mode 100644
index 00000000..ac4ebddd
--- /dev/null
+++ b/app/views/ordergroup_invoices/destroy.js.erb
@@ -0,0 +1 @@
+$("#multi_order_<%= @multi_order.id %>_modal").html("<%= escape_javascript(render partial: 'links', locals: {multi_order: @multi_order}) %>");
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/select_all_sepa_sequence_type.js.erb b/app/views/ordergroup_invoices/select_all_sepa_sequence_type.js.erb
new file mode 100644
index 00000000..60519b8b
--- /dev/null
+++ b/app/views/ordergroup_invoices/select_all_sepa_sequence_type.js.erb
@@ -0,0 +1 @@
+$("#multi_order_<%= @multi_order.id %>_modal").html("<%= escape_javascript(render partial: 'modal', locals: { multi_order: @multi_order, sequence_type: @sequence_type }) %>");
diff --git a/app/views/ordergroup_invoices/select_sepa_sequence_type.js.erb b/app/views/ordergroup_invoices/select_sepa_sequence_type.js.erb
new file mode 100644
index 00000000..fa249c87
--- /dev/null
+++ b/app/views/ordergroup_invoices/select_sepa_sequence_type.js.erb
@@ -0,0 +1 @@
+$("#select_sepa_sequence_type_multi_<%= @ordergroup_invoice.id %>").html("<%= j(render partial: 'select_sepa_sequence_type', locals: {ordergroup_invoice: @ordergroup_invoice, multi_group_order: @multi_group_order}) %>");
\ No newline at end of file
diff --git a/app/views/ordergroup_invoices/toggle_all_paid.js.erb b/app/views/ordergroup_invoices/toggle_all_paid.js.erb
new file mode 100644
index 00000000..40a788cc
--- /dev/null
+++ b/app/views/ordergroup_invoices/toggle_all_paid.js.erb
@@ -0,0 +1,4 @@
+<% @ordergroup_invoices.each do |ordergroup_invoice| %>
+  $("#paid_multi_<%= ordergroup_invoice.id %>").html("<%= escape_javascript(render partial: 'toggle_paid', locals: { ordergroup_invoice: ordergroup_invoice }) %>");
+<% end %>
+  $("#toggle_all_paid_multi_<%= @multi_order.id %>").html("<%= escape_javascript(render partial: 'toggle_all_paid', locals: { multi_order: @multi_order }) %>");
diff --git a/app/views/ordergroup_invoices/toggle_all_sepa_downloaded.js.erb b/app/views/ordergroup_invoices/toggle_all_sepa_downloaded.js.erb
new file mode 100644
index 00000000..0c68246b
--- /dev/null
+++ b/app/views/ordergroup_invoices/toggle_all_sepa_downloaded.js.erb
@@ -0,0 +1,4 @@
+<% @ordergroup_invoices.each do |ordergroup_invoice| %>
+  $("#sepa_downloaded_multi_<%= ordergroup_invoice.id %>").html("<%= escape_javascript(render partial: 'toggle_sepa_downloaded', locals: { ordergroup_invoice: ordergroup_invoice }) %>");
+<% end %>
+  $("#toggle_all_sepa_downloaded_multi_<%= @multi_order.id %>").html("<%= escape_javascript(render partial: 'toggle_all_sepa_downloaded', locals: { multi_order: @multi_order }) %>");
diff --git a/app/views/ordergroup_invoices/toggle_paid.js.erb b/app/views/ordergroup_invoices/toggle_paid.js.erb
new file mode 100644
index 00000000..4097f4d6
--- /dev/null
+++ b/app/views/ordergroup_invoices/toggle_paid.js.erb
@@ -0,0 +1 @@
+$("#paid_multi_<%= @ordergroup_invoice.id %>").html("<%= escape_javascript(render partial: 'toggle_paid', locals: {ordergroup_invoice: @ordergroup_invoice}) %>");
diff --git a/app/views/ordergroup_invoices/toggle_sepa_downloaded.js.erb b/app/views/ordergroup_invoices/toggle_sepa_downloaded.js.erb
new file mode 100644
index 00000000..9a57c052
--- /dev/null
+++ b/app/views/ordergroup_invoices/toggle_sepa_downloaded.js.erb
@@ -0,0 +1 @@
+$("#sepa_downloaded_multi_<%= @ordergroup_invoice.id %>").html("<%= escape_javascript(render partial: 'toggle_sepa_downloaded', locals: {ordergroup_invoice: @ordergroup_invoice}) %>");
diff --git a/config/app_config.yml.SAMPLE b/config/app_config.yml.SAMPLE
deleted file mode 100644
index b43b7935..00000000
--- a/config/app_config.yml.SAMPLE
+++ /dev/null
@@ -1,186 +0,0 @@
-# Foodsoft configuration
-
-default: &defaults
-  # If you wanna serve more than one foodcoop with one installation
-  # Don't forget to setup databases for each foodcoop. See also MULTI_COOP_INSTALL
-  multi_coop_install: false
-
-  # If multi_coop_install you have to use a coop name, which you you wanna be selected by default
-  # Please use basic characters for scope names, matching /[-a-zA-Z0-9_]+/
-  default_scope: 'f'
-
-  # name of this foodcoop
-  name: FC Test
-  # foodcoop contact information (used for FAX messages)
-  contact:
-    street: Grüne Straße 103
-    zip_code: "10997"
-    city: Berlin
-    country: Deutschland
-    email: foodsoft@foodcoop.test
-    phone: "030 323 23249"
-
-  # Homepage
-  homepage: http://www.foodcoop.test
-
-  # foodsoft documentation URL
-  help_url: https://github.com/foodcoops/foodsoft/wiki/Doku
-
-  # documentation URL for the apples&pears work system
-  applepear_url: https://github.com/foodcoops/foodsoft/wiki/%C3%84pfel-u.-Birnen
-
-  # custom foodsoft software URL (used in footer)
-  #foodsoft_url: https://github.com/foodcoops/foodsoft
-
-  # URL to redirect to after logging out
-  # logout_redirect_url: https://foodcoop.test
-
-  # Default language
-  #default_locale: en
-  # By default, foodsoft takes the language from the webbrowser/operating system.
-  # In case you really want foodsoft in a certain language by default, set this to true.
-  # When members are logged in, the language from their profile settings is still used.
-  #ignore_browser_locale: false
-  # Default timezone, e.g. UTC, Amsterdam, Berlin, etc.
-  #time_zone: Berlin
-  # Currency symbol, and whether to add a whitespace after the unit.
-  #currency_unit: €
-  #currency_space: true
-
-  # price markup in percent
-  price_markup: 2.0
-
-  # default vat percentage for new articles
-  tax_default: 7.0
-
-  # tolerance order option: If set to false, article tolerance values do not count
-  # for total article price as long as the order is not finished.
-  tolerance_is_costly: false
-
-  # Ordergroups, which have less than 75 apples should not be allowed to make new orders
-  # Comment out this option to activate this restriction
-  #stop_ordering_under: 75
-
-  # Comment out to completely hide apple points (be sure to comment stop_ordering_under)
-  #use_apple_points: false
-
-  # ordergroups can only order when their balance is higher than or equal to this
-  # not fully enforced right now, since the check is only client-side
-  #minimum_balance: 0
-
-  # how many days there are between two periodic tasks
-  #tasks_period_days: 7
-  # how many days upfront periodic tasks are created
-  #tasks_upfront_days: 49
-
-  # default order schedule, used to provide initial dates for new orders
-  # (recurring dates in ical format; no spaces!)
-  #order_schedule:
-  #  ends:
-  #    recurr: FREQ=WEEKLY;INTERVAL=2;BYDAY=MO
-  #    time: '9:00'
-  #  # reference point, this is generally the first pickup day; empty is often ok
-  #  #initial:
-
-  # When use_nick is enabled, there will be a nickname field in the user form,
-  # and the option to show a nickname instead of full name to foodcoop members.
-  # Members of a user's groups and administrators can still see full names.
-  use_nick: false
-
-  # Most plugins can be enabled/disabled here as well. Messages and wiki are enabled
-  # by default and need to be set to false to disable. Most other plugins needs to
-  # be enabled before they do anything.
-  #use_wiki: true
-  #use_messages: true
-
-  # When enabled only administrators can access the member list.
-  #disable_members_overview: true
-
-  # Base font size for generated PDF documents
-  #pdf_font_size: 12
-  # Page size for generated PDF documents
-  #pdf_page_size: A4
-  # Some documents (like group and article PDFs) can include page breaks
-  # after each sublist.
-  #pdf_add_page_breaks: true
-  # Alternatively, this can be set for each document.
-  #pdf_add_page_breaks:
-  #  order_by_groups: true
-  #  order_by_articles: true
-
-  # Page footer (html allowed). Default is a Foodsoft footer. Set to `blank` for no footer.
-  #page_footer: <a href="http://www.foodcoop.test/">FC Test</a> is supported by <a href="http://www.hoster.test/">Hoster</a>.
-
-  # Custom CSS to add
-  #custom_css: 'body { background-color: #fcffba; }'
-
-  # Custom fields for invoice, odergroup, supplier and user.
-  # Check out https://github.com/plataformatec/simple_form for details about the supported options.
-  #custom_fields:
-  #  user:
-  #    - name: address
-  #      label: Address
-  #    - name: birthday
-  #      label: Birthday
-  #      as: date_picker
-
-  # Uncomment to add tracking code for web statistics, e.g. for Matomo. (Added to bottom of page)
-  #webstats_tracking_code: |
-  #  <!-- Matomo -->
-  #  ......
-
-  # email address to be used as sender
-  email_sender: foodsoft@foodcoop.test
-
-  # domain to be used for reply emails
-  #reply_email_domain: reply.foodcoop.test
-
-  # If your foodcoop uses a mailing list instead of internal messaging system
-  #mailing_list: list@example.org
-  #mailing_list_subscribe: list-subscribe@example.org
-
-  # Config for the exception_notification plugin
-  notification:
-    error_recipients:
-      - admin@foodcoop.test
-    feedback_recipients:
-      - support@foodcoop.test
-    sender_address: "\"Foodsoft Error\" <foodsoft@foodcoop.test>"
-    email_prefix: "[Foodsoft]"
-
-  # http config for this host to generate links in emails (uses environment config when not set)
-  #protocol: http
-  #host: localhost
-  #port: 3000
-  #script_name: "/"
-
-  # Access to sharedlists, the external article-database.
-  # This allows a foodcoop to subscribe to a selection of a supplier's full assortment,
-  # and makes it possible to share data with several foodcoops. Using this requires installing
-  # an additional application with a separate database.
-  #shared_lists:
-  #  adapter: mysql2
-  #  host: localhost
-  #  database: sharedlists_development
-  #  username: root
-  #  password:
-  #  encoding: utf8
-  #  socket: /opt/lampp/var/mysql/mysql.sock
-  #
-  # Instead of defining all details here, you can also point to an entry in database.yml.
-  #shared_lists: shared_lists
-
-  # default to allow automatically adding new articles on sync only when less than 200 articles in total
-  #shared_supplier_article_sync_limit: 200
-
-  # number of days after which attachment files get deleted
-  #attachment_retention_days: 365
-
-development:
-  <<: *defaults
-
-test:
-  <<: *defaults
-
-production:
-  <<: *defaults
diff --git a/config/environments/development.rb.SAMPLE b/config/environments/development.rb.SAMPLE
index 50787eca..ed5bb855 100644
--- a/config/environments/development.rb.SAMPLE
+++ b/config/environments/development.rb.SAMPLE
@@ -69,8 +69,8 @@ Rails.application.configure do
 
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
-  config.file_watcher = ActiveSupport::EventedFileUpdateChecker
-
+  config.file_watcher = ActiveSupport::FileUpdateChecker
+  
   # Run resque tasks as part of the main app (not recommended for production)
   Resque.inline = true unless ENV['REDIS_URL']
 end
diff --git a/config/locales/de.yml b/config/locales/de.yml
index c5087c68..7b50fca7 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -107,12 +107,14 @@ de:
           generate: Rechnung erzeugen
           generate_with_date: setzen & erzeugen
           invoice_date: Datum der Bestellgruppenrechnung
+          invoice_number: Rechnungsnummer
           ordergroup: Bestellgruppe
           paid: Bezahlt
           not_paid: Nicht Bezahlt
           sepa_downloaded: SEPA exportiert
           sepa_not_downloaded: SEPA nicht exportiert
-          sepa_not_ready: Wichtige Einstellungen für SEPA Export in Administration -> Einstellungen-> Finanzen fehlen
+          sepa_not_ready:
+           SEPA Export nicht verfügbar. Wichtige Einstellungen für SEPA Export in Administration -> Einstellungen-> Finanzen fehlen
           sepa_select: Für SEPA Export markieren
           sepa_sequence_type: SEPA Typ
         open_details_modal: Details ein/ausklappen
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 52e9b249..ae1f3cc5 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -107,6 +107,7 @@ en:
           generate: generate invoice
           generate_with_date: set & generate
           invoice_date: date of group order invoice
+          invoice_number: invoice number
           ordergroup: Ordergroup
           paid: paid
           not_paid: unpaid
diff --git a/config/routes.rb b/config/routes.rb
index cc965d67..9d839c04 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -148,13 +148,24 @@ Rails.application.routes.draw do
     end
 
 
+    post 'finance/ordergroup_invoice', to: 'ordergroup_invoices#create_multiple'
     post 'finance/group_order_invoice', to: 'group_order_invoices#create_multiple'
 
     get 'orders/:order_id/group_order_invoices/download_all', to: 'group_order_invoices#download_all', as: 'download_all_group_order_invoices'
+    get 'multi_orders/:multi_order_id/group_order_invoices/download_all', to: 'ordergroup_invoices#download_all', as: 'download_all_ordergroup_invoices'
 
     resources :ordergroup_invoices do
       member do
         get :download_collective
+        patch :select_sepa_sequence_type
+        patch :toggle_paid
+        patch :toggle_sepa_downloaded
+      end
+      collection do
+        get :download_within_date
+        patch :select_all_sepa_sequence_type
+        patch :toggle_all_sepa_downloaded
+        patch :toggle_all_paid
       end
     end
 
@@ -172,9 +183,10 @@ Rails.application.routes.draw do
       end
     end
 
-    resources :multi_orders, only: [:create, :show] do
+    resources :multi_orders, only: [:create, :show, :destroy] do
       member do
         get :generate_ordergroup_invoices
+        get :collective_direct_debit
       end
     end
 
diff --git a/db/migrate/20250515111627_add_multi_group_order_id_to_ordergroup_invoices.rb b/db/migrate/20250515111627_add_multi_group_order_id_to_ordergroup_invoices.rb
new file mode 100644
index 00000000..4c7bb708
--- /dev/null
+++ b/db/migrate/20250515111627_add_multi_group_order_id_to_ordergroup_invoices.rb
@@ -0,0 +1,5 @@
+class AddMultiGroupOrderIdToOrdergroupInvoices < ActiveRecord::Migration[7.0]
+  def change
+    add_reference :ordergroup_invoices, :multi_group_order, foreign_key: true, type: :integer
+  end
+end
diff --git a/db/migrate/20250516104953_make_group_order_key_nullable.rb b/db/migrate/20250516104953_make_group_order_key_nullable.rb
new file mode 100644
index 00000000..eebcceb1
--- /dev/null
+++ b/db/migrate/20250516104953_make_group_order_key_nullable.rb
@@ -0,0 +1,12 @@
+class MakeGroupOrderKeyNullable < ActiveRecord::Migration[7.0]
+  def change
+    # Make column nullable (safe even if already is)
+    change_column_null :group_orders, :multi_group_order_id, true
+
+    # Remove old FK if it exists (avoid name conflict)
+    remove_foreign_key :group_orders, column: :multi_group_order_id
+
+    # Re-add with ON DELETE SET NULL
+    add_foreign_key :group_orders, :multi_group_orders, column: :multi_group_order_id, on_delete: :nullify
+  end
+end
diff --git a/db/routes.rb b/db/routes.rb
index cc965d67..e0c41b48 100644
--- a/db/routes.rb
+++ b/db/routes.rb
@@ -148,6 +148,7 @@ Rails.application.routes.draw do
     end
 
 
+    post 'finance/ordergroup_invoice', to: 'ordergroup_invoices#create_multiple',
     post 'finance/group_order_invoice', to: 'group_order_invoices#create_multiple'
 
     get 'orders/:order_id/group_order_invoices/download_all', to: 'group_order_invoices#download_all', as: 'download_all_group_order_invoices'
@@ -155,6 +156,15 @@ Rails.application.routes.draw do
     resources :ordergroup_invoices do
       member do
         get :download_collective
+        patch :select_sepa_sequence_type
+        patch :toggle_paid
+        patch :toggle_sepa_downloaded
+      end
+      collection do
+        get :download_within_date
+        patch :select_all_sepa_sequence_type
+        patch :toggle_all_sepa_downloaded
+        patch :toggle_all_paid
       end
     end
 
diff --git a/db/schema.rb b/db/schema.rb
index 7e82048e..51a2ac73 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2025_04_30_091541) do
+ActiveRecord::Schema[7.0].define(version: 2025_05_16_104953) do
   create_table "action_text_rich_texts", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
     t.string "name", null: false
     t.text "body", size: :long
@@ -226,7 +226,6 @@ ActiveRecord::Schema[7.0].define(version: 2025_04_30_091541) do
     t.index ["order_id"], name: "index_group_orders_on_order_id"
     t.index ["ordergroup_id", "order_id"], name: "index_group_orders_on_ordergroup_id_and_order_id", unique: true
     t.index ["ordergroup_id"], name: "index_group_orders_on_ordergroup_id"
-    t.index ["ordergroup_invoice_id"], name: "index_group_orders_on_ordergroup_invoice_id"
   end
 
   create_table "groups", id: :integer, charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
@@ -407,6 +406,8 @@ ActiveRecord::Schema[7.0].define(version: 2025_04_30_091541) do
     t.string "sepa_sequence_type", default: "RCUR"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "multi_group_order_id"
+    t.index ["multi_group_order_id"], name: "index_ordergroup_invoices_on_multi_group_order_id"
   end
 
   create_table "orders", id: :integer, charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
@@ -626,7 +627,8 @@ ActiveRecord::Schema[7.0].define(version: 2025_04_30_091541) do
 
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
   add_foreign_key "group_order_invoice_group_orders", "group_orders"
-  add_foreign_key "group_orders", "multi_group_orders"
+  add_foreign_key "group_orders", "multi_group_orders", on_delete: :nullify
   add_foreign_key "multi_group_orders", "multi_orders"
+  add_foreign_key "ordergroup_invoices", "multi_group_orders"
   add_foreign_key "orders", "multi_orders"
 end