diff --git a/pkg/cloudcommon/db/taskman/tasks.go b/pkg/cloudcommon/db/taskman/tasks.go
index 277032c453..de893d3476 100644
--- a/pkg/cloudcommon/db/taskman/tasks.go
+++ b/pkg/cloudcommon/db/taskman/tasks.go
@@ -538,7 +538,7 @@ func (self *STask) NotifyParentTaskFailure(ctx context.Context, reason string) {
 	if len(reason) > 100 {
 		reason = reason[:100] + "..."
 	}
-	body.Add(jsonutils.NewString(fmt.Sprintf("Subtask %s failed: %s", self.TaskName, reason)))
+	body.Add(jsonutils.NewString(fmt.Sprintf("Subtask %s failed: %s", self.TaskName, reason)), "__reason__")
 	self.NotifyParentTaskComplete(ctx, body, true)
 }