19.0 vanilla

odoo-bringout-oca-ocb-l10n_de/l10n_de/models/account_account.py

@@ -0,0 +1,19 @@
+from odoo import models, _
+from odoo.exceptions import UserError
+
+
+class AccountAccount(models.Model):
+    _inherit = 'account.account'
+
+    def write(self, vals):
+        if (
+            'code' in vals
+            and self.env.company.account_fiscal_country_id.code == 'DE'
+            and any(
+                self.env.company in a.company_ids and a.code != vals['code']
+                for a in self
+            )
+        ):
+            if self.env['account.move.line'].search_count([('account_id', 'in', self.ids)], limit=1):
+                raise UserError(_("You can not change the code of an account."))
+        return super().write(vals)