diff --git a/addons/point_of_sale/models/pos_session.py b/addons/point_of_sale/models/pos_session.py
index a3fedfe734c..02de2bc4a36 100644
--- a/addons/point_of_sale/models/pos_session.py
+++ b/addons/point_of_sale/models/pos_session.py
@@ -1145,7 +1145,7 @@ class PosSession(models.Model):
     def _alert_old_session(self):
         # If the session is open for more then one week,
         # log a next activity to close the session.
-        sessions = self.search([('start_at', '<=', (fields.datetime.now() - timedelta(days=7))), ('state', '!=', 'closed')])
+        sessions = self.sudo().search([('start_at', '<=', (fields.datetime.now() - timedelta(days=7))), ('state', '!=', 'closed')])
         for session in sessions:
             if self.env['mail.activity'].search_count([('res_id', '=', session.id), ('res_model', '=', 'pos.session')]) == 0:
                 session.activity_schedule(