diff --git a/guardian/views.py b/guardian/views.py
index 4d9517f..94ff8f4 100644
--- a/guardian/views.py
+++ b/guardian/views.py
@@ -117,6 +117,7 @@ class CreateTaskAPIView(viewsets.ModelViewSet):
             filename = f"images/{image}"
             image_url = upload_image_to_alibaba(image, filename)
             image_data = image_url
+            data.pop('default_image')
         serializer = TaskSerializer(context={"user":request.user, "image":image_data}, data=data)
         if serializer.is_valid():
             serializer.save()