diff --git a/addons/point_of_sale/models/pos_config.py b/addons/point_of_sale/models/pos_config.py
index aee62049864..014b11cab7b 100644
--- a/addons/point_of_sale/models/pos_config.py
+++ b/addons/point_of_sale/models/pos_config.py
@@ -461,7 +461,7 @@ class PosConfig(models.Model):
         """ open the pos interface """
         self.ensure_one()
         # check all constraints, raises if any is not met
-        self._validate_fields(self._fields)
+        self._validate_fields(set(self._fields) - {"cash_control"})
         return {
             'type': 'ir.actions.act_url',
             'url':   '/pos/web/',