diff --git a/app/repositories/project.py b/app/repositories/project.py
index bbefe29..be22ebb 100644
--- a/app/repositories/project.py
+++ b/app/repositories/project.py
@@ -104,7 +104,7 @@ class ProjectRepository(BaseRepository[ProjectModel]):
         if update.monitor:
             update.has_monitor = True
             await self.update_report_price(update)
-            if update.monitor.detail.date_create_project != old_project.monitor.detail.date_create_project or update.monitor.detail.first_time != old_project.monitor.detail.first_time:
+            if old_project.monitor and old_project.monitor.detail and update.monitor and update.monitor.detail and (update.monitor.detail.date_create_project != old_project.monitor.detail.date_create_project or update.monitor.detail.first_time != old_project.monitor.detail.first_time):
                 update.date_delay = self.creat_date_delay(update) + datetime.timedelta(days=update.all_delay_day)
         update.u_at()
         await use_collection(COLLECTION).update_one({"_id": _id}, {"$set": update.mongo_dict()})