diff --git a/pos_sequence_ref_number/models/pos_order.py b/pos_sequence_ref_number/models/pos_order.py
index bf199cfc..77f1f07e 100644
--- a/pos_sequence_ref_number/models/pos_order.py
+++ b/pos_sequence_ref_number/models/pos_order.py
@@ -15,7 +15,7 @@ class PosOrder(models.Model):
         next = vals.get('_sequence_ref_number', False)
         next = int(next) if next else False
         if vals.get('session_id') and next is not False:
-            session = self.env['pos.session'].browse(vals['session_id'])
+            session = self.env['pos.session'].sudo().browse(vals['session_id'])
             if next != session.config_id.sequence_id.number_next_actual:
                 session.config_id.sequence_id.number_next_actual = next
         if vals.get('_sequence_ref_number') is not None: