Correctly save task status

aleksis/core/schema/celery_progress.py

@@ -88,7 +88,7 @@ class CeleryProgressFetchedMutation(graphene.Mutation):
     celery_progress = graphene.Field(CeleryProgressType)
 
     def mutate(root, info, task_id, **kwargs):
-        task = TaskUserAssignment.objects.filter(task_result__task_id=task_id)
+        task = TaskUserAssignment.objects.get(task_result__task_id=task_id)
 
         if not info.context.user.has_perm("core.view_progress_rule", task):
             return None