diff --git a/eventmesh-common/src/main/java/org/apache/eventmesh/common/protocol/http/common/EventMeshRetCode.java b/eventmesh-common/src/main/java/org/apache/eventmesh/common/protocol/http/common/EventMeshRetCode.java
index 11f036dfbb..116b0d1670 100644
--- a/eventmesh-common/src/main/java/org/apache/eventmesh/common/protocol/http/common/EventMeshRetCode.java
+++ b/eventmesh-common/src/main/java/org/apache/eventmesh/common/protocol/http/common/EventMeshRetCode.java
@@ -40,7 +40,7 @@ public enum EventMeshRetCode {
     EVENTMESH_UNSUBSCRIBE_ERR(18, "eventMesh unsubscribe err"),
     EVENTMESH_HEARTBEAT_ERR(19, "eventMesh heartbeat err"),
     EVENTMESH_ACL_ERR(20, "eventMesh acl err"),
-    EVENTMESH_HTTP_MES_SEND_OVER_LIMIT_ERR(20, "eventMesh http msg send over the limit, ");
+    EVENTMESH_HTTP_MES_SEND_OVER_LIMIT_ERR(21, "eventMesh http msg send over the limit, ");
 
     private Integer retCode;