[FIX] account: fix traceback on credit note after editing Group of Taxes

- Go to Accounting > Configuration > Taxes and create a new Group of Taxes:
  * Tax Name: TaxGroup
  * Tax Computation: Group of Taxes
  * Add 2 taxes (i.e. T1 15% and T2 20%)
- Go to Accounting > Customers > Invoices and create a new Invoice:
  * Add a Product and select TaxGroup as Taxes
- Post the invoice
- Go to TaxGroup edition and remove T2 20%
- Go back to create Invoice and add a Credit Note
At Credit Note creation, a KeyError is triggered.

opw-2321199

closes odoo/odoo#56729

X-original-commit: 816c0fa0f74d6126aecd663183361e53a1d8b460
Signed-off-by: Anh Thao PHAM <kitan191@users.noreply.github.com>

addons/account/i18n/account.pot

@@ -6071,6 +6071,14 @@ msgid ""
 "entry again and cancel it thanks to a regular revert."
 msgstr ""
 
+#. module: account
+#: code:addons/account/models/account_move.py:0
+#, python-format
+msgid ""
+"It seems that the taxes have been modified since the creation of the journal"
+" entry. You should create the credit note manually instead."
+msgstr ""
+
 #. module: account
 #: model_terms:ir.ui.view,arch_db:account.view_move_form
 msgid "JRNL/2016/00001"

addons/account/models/account_move.py

@@ -2121,6 +2121,8 @@ class AccountMove(models.Model):
             elif line_vals.get('tax_repartition_line_id'):
                 # Tax line.
                 invoice_repartition_line = self.env['account.tax.repartition.line'].browse(line_vals['tax_repartition_line_id'])
+                if invoice_repartition_line not in tax_repartition_lines_mapping:
+                    raise UserError(_("It seems that the taxes have been modified since the creation of the journal entry. You should create the credit note manually instead."))
                 refund_repartition_line = tax_repartition_lines_mapping[invoice_repartition_line]
 
                 # Find the right account.