diff --git a/backend/src/main/java/com/qqchen/deploy/backend/workflow/dto/inputmapping/ApprovalInputMapping.java b/backend/src/main/java/com/qqchen/deploy/backend/workflow/dto/inputmapping/ApprovalInputMapping.java
index bac82894..c0a83b08 100644
--- a/backend/src/main/java/com/qqchen/deploy/backend/workflow/dto/inputmapping/ApprovalInputMapping.java
+++ b/backend/src/main/java/com/qqchen/deploy/backend/workflow/dto/inputmapping/ApprovalInputMapping.java
@@ -1,5 +1,6 @@
 package com.qqchen.deploy.backend.workflow.dto.inputmapping;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.qqchen.deploy.backend.workflow.enums.ApprovalModeEnum;
 import com.qqchen.deploy.backend.workflow.enums.ApproverTypeEnum;
 import com.qqchen.deploy.backend.workflow.enums.TimeoutActionEnum;
@@ -14,6 +15,7 @@ import java.util.List;
  * @date 2025-10-23
  */
 @Data
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class ApprovalInputMapping {
 
     /**