diff --git a/app/documents/group_order_invoice_pdf.rb b/app/documents/group_order_invoice_pdf.rb
index 35cceee6..b2b149a5 100644
--- a/app/documents/group_order_invoice_pdf.rb
+++ b/app/documents/group_order_invoice_pdf.rb
@@ -63,8 +63,7 @@ class GroupOrderInvoicePdf < RenderPdf
     end
 
     move_down 20
-    text I18n.t('documents.group_order_invoice_pdf.payment_method', payment_method: FinancialTransactionType.find(@options[:payment_method]).name)
-
+    text I18n.t('documents.group_order_invoice_pdf.payment_method', payment_method: @options[:payment_method])
     text I18n.t('documents.group_order_invoice_pdf.table_headline')
     move_down 5
 
diff --git a/app/models/group_order_invoice.rb b/app/models/group_order_invoice.rb
index acfc10e3..dab7bc98 100644
--- a/app/models/group_order_invoice.rb
+++ b/app/models/group_order_invoice.rb
@@ -41,7 +41,7 @@ class GroupOrderInvoice < ApplicationRecord
   def init
     self.invoice_date = Time.now unless invoice_date
     self.invoice_number = generate_invoice_number(1) unless self.invoice_number
-    self.payment_method = FoodsoftConfig[:group_order_invoices]&.[](:payment_method) || I18n.t('activerecord.attributes.group_order_invoice.payment_method') unless self.payment_method
+    self.payment_method = group_order&.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
   end
 
   def name
diff --git a/db/migrate/20231211121430_change_group_order_invoice_payment_method.rb b/db/migrate/20231211121430_change_group_order_invoice_payment_method.rb
new file mode 100644
index 00000000..32ad37b7
--- /dev/null
+++ b/db/migrate/20231211121430_change_group_order_invoice_payment_method.rb
@@ -0,0 +1,15 @@
+class ChangeGroupOrderInvoicePaymentMethod < ActiveRecord::Migration[7.0]
+  def change
+    GroupOrderInvoice.all.each do |group_order_invoice|
+      case group_order_invoice.payment_method
+      when 'Guthaben'
+        group_order_invoice.payment_method = 'Guthaben'
+      when /\A\d+\z/
+        group_order_invoice.payment_method = FinancialTransactionType.find_by(id: group_order_invoice.payment_method)&.name || 'Guthaben'
+      else
+        group_order_invoice.payment_method = group_order_invoice.payment_method || 'Guthaben'
+      end
+      group_order_invoice.save!
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index d9840d1b..749f79bd 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: 2023_11_28_133642) do
+ActiveRecord::Schema[7.0].define(version: 2023_12_11_121430) do
   create_table "action_text_rich_texts", charset: "utf8mb4", force: :cascade do |t|
     t.string "name", null: false
     t.text "body", size: :long