diff --git a/models/booking_event_registration.py b/models/booking_event_registration.py
index 51392d5..c652ab0 100644
--- a/models/booking_event_registration.py
+++ b/models/booking_event_registration.py
@@ -17,7 +17,7 @@ class EventRegistration(models.Model):
         track_visibility='onchange',
         
     )
-    booking_event=fields.Boolean(related='event_id.booking_event')
+    booking_event=fields.Boolean(related='event_id.booking_event',store=True)
     event_end=fields.Boolean(related='event_id.stage_id.pipe_end')
 
     medical_concern=fields.Selection(