[FIX] helpdesk_mgmt_activity: Update stage after create activity is f…

…ixed and for activity set default activity user or current user

helpdesk_mgmt_activity/models/helpdesk_ticket.py

@@ -141,7 +141,6 @@ def perform_action(self):
                 date_deadline=self.date_deadline,
                 activity_type_id=self.source_activity_type_id.id,
                 ticket_id=self.id,
-                user_id=self.assigned_user_id.id,
             )
             self.set_next_stage()
         except Exception as e:
@@ -152,5 +151,6 @@ def perform_action(self):
             "params": {
                 "type": "success",
                 "message": _("Activity has been created!"),
+                "next": {"type": "ir.actions.act_window_close"},
             },
         }