1 files changed, 19 insertions, 0 deletions
diff --git a/addons/l10n_fr_pos_cert/models/account_fiscal_position.py b/addons/l10n_fr_pos_cert/models/account_fiscal_position.py
new file mode 100644
index 00000000..17661e20
--- /dev/null
+++ b/addons/l10n_fr_pos_cert/models/account_fiscal_position.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+from odoo import _, models
+from odoo.exceptions import UserError
+
+
+class AccountFiscalPosition(models.Model):
+    _inherit = "account.fiscal.position"
+
+    def write(self, vals):
+        if "tax_ids" in vals:
+            if self.env["pos.order"].sudo().search_count([("fiscal_position_id", "in", self.ids)]):
+                raise UserError(
+                    _(
+                        "You cannot modify a fiscal position used in a POS order. "
+                        "You should archive it and create a new one."
+                    )
+                )
+        return super(AccountFiscalPosition, self).write(vals)