diff --git a/ui/src/workflow/common/app-node.ts b/ui/src/workflow/common/app-node.ts
index e3cdb3c4f..4b159cea1 100644
--- a/ui/src/workflow/common/app-node.ts
+++ b/ui/src/workflow/common/app-node.ts
@@ -372,7 +372,9 @@ class AppNodeModel extends HtmlResize.model {
     this.sourceRules.push({
       message: t('views.applicationWorkflow.tip.notRecyclable'),
       validate: (sourceNode: any, targetNode: any, sourceAnchor: any, targetAnchor: any) => {
-        return !isLoop(sourceNode.id, targetNode.id)
+        const up_node_list = this.graphModel.getNodeIncomingNode(targetNode.id)
+        const is_c = up_node_list.find((up_node) => up_node.id == sourceNode.id)
+        return !is_c && !isLoop(sourceNode.id, targetNode.id)
       },
     })