diff --git a/addons/calendar/models/calendar_event.py b/addons/calendar/models/calendar_event.py
index 2092cb3e2b7..bdec6689e98 100644
--- a/addons/calendar/models/calendar_event.py
+++ b/addons/calendar/models/calendar_event.py
@@ -679,11 +679,6 @@ class Meeting(models.Model):
         if not self.env.su and private_fields:
             # display public and confidential events
             domain = AND([domain, ['|', ('privacy', '!=', 'private'), ('user_id', '=', self.env.user.id)]])
-            self.env['bus.bus']._sendone(self.env.user.partner_id, 'simple_notification', {
-                'type': 'danger',
-                'title': _('Private Event Excluded'),
-                'message': _('Grouping by %s is not allowed on private events.', ', '.join([self._fields[field_name].string for field_name in private_fields]))
-            })
             return super(Meeting, self).read_group(domain, fields, groupby, offset=offset, limit=limit, orderby=orderby, lazy=lazy)
         return super(Meeting, self).read_group(domain, fields, groupby, offset=offset, limit=limit, orderby=orderby, lazy=lazy)