fixing

app/applicationlayer/cms/form/download/views.py

@@ -32,6 +32,7 @@ class DownloadRequest(XLSXFileMixin, ReadOnlyModelViewSet):
         ).distinct()
 
         serializer = headers(data=data, many=True)
+        serializer.is_valid(reaise_exception=False)
         return Response(serializer.data)
 
     column_header = {