diff --git a/server/apps/supervision/views.py b/server/apps/supervision/views.py
index 6156e63..5f14ffa 100644
--- a/server/apps/supervision/views.py
+++ b/server/apps/supervision/views.py
@@ -524,6 +524,8 @@ class Task2DoViewSet(ListModelMixin, GenericViewSet):
         obj = self.get_object()
         field = request.data.get('key')
         theattr = getattr(obj, field, None)
+        if theattr == 0:
+            return Response()
         if theattr is None:
             setattr(obj, field, 0)
             if field == 'num_complaint':