diff --git a/account_banking_mandate/__manifest__.py b/account_banking_mandate/__manifest__.py
index 7ae0f10ce..1bc549865 100644
--- a/account_banking_mandate/__manifest__.py
+++ b/account_banking_mandate/__manifest__.py
@@ -7,7 +7,7 @@
 {
     'name': 'Account Banking Mandate',
     'summary': 'Banking mandates',
-    'version': '11.0.1.2.1',
+    'version': '11.0.1.2.2',
     'license': 'AGPL-3',
     'author': "Compassion CH, "
               "Tecnativa, "
diff --git a/account_banking_mandate/models/account_banking_mandate.py b/account_banking_mandate/models/account_banking_mandate.py
index 6245567aa..e0d04ff33 100644
--- a/account_banking_mandate/models/account_banking_mandate.py
+++ b/account_banking_mandate/models/account_banking_mandate.py
@@ -135,7 +135,7 @@ class AccountBankingMandate(models.Model):
                     (mandate.display_name, ))
 
     @api.multi
-    @api.constrains('state', 'partner_bank_id')
+    @api.constrains('state', 'partner_bank_id', 'signature_date')
     def _check_valid_state(self):
         for mandate in self:
             if mandate.state == 'valid':