diff --git a/app/documents/group_order_invoice_pdf.rb b/app/documents/group_order_invoice_pdf.rb
index aba39506..bc6c5c43 100644
--- a/app/documents/group_order_invoice_pdf.rb
+++ b/app/documents/group_order_invoice_pdf.rb
@@ -1,4 +1,4 @@
-class GroupOrderInvoicePdf < RenderPDF
+class GroupOrderInvoicePdf < RenderPdf
   def filename
     I18n.t('documents.group_order_invoice_pdf.filename', :number => @options[:invoice_number]) + '.pdf'
   end
diff --git a/db/schema.rb b/db/schema.rb
index 50c24c41..742cd8ea 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -182,6 +182,16 @@ ActiveRecord::Schema[7.0].define(version: 2023_01_06_144440) do
     t.index ["order_article_id"], name: "index_group_order_articles_on_order_article_id"
   end
 
+  create_table "group_order_invoices", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
+    t.integer "group_order_id"
+    t.bigint "invoice_number"
+    t.date "invoice_date"
+    t.string "payment_method"
+    t.datetime "created_at", precision: nil, null: false
+    t.datetime "updated_at", precision: nil, null: false
+    t.index ["group_order_id"], name: "index_group_order_invoices_on_group_order_id", unique: true
+  end
+
   create_table "group_orders", id: :integer, charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
     t.integer "ordergroup_id"
     t.integer "order_id", default: 0, null: false