diff --git a/laws-modules/src/main/java/com/jero/modules/activiti/process/common/utility/FlowUtility.java b/laws-modules/src/main/java/com/jero/modules/activiti/process/common/utility/FlowUtility.java
index 9c52fc3f..835fd107 100644
--- a/laws-modules/src/main/java/com/jero/modules/activiti/process/common/utility/FlowUtility.java
+++ b/laws-modules/src/main/java/com/jero/modules/activiti/process/common/utility/FlowUtility.java
@@ -22,10 +22,7 @@ import org.springframework.beans.BeanUtils;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.util.Date;
-import java.util.List;
-import java.util.Map;
-import java.util.Objects;
+import java.util.*;
 import java.util.stream.Collectors;
 
 /**
@@ -154,17 +151,14 @@ public class FlowUtility {
      * @return 返回一个新的Map，其中所有值为List类型的元素都被转换为以逗号分隔的字符串。
      */
     public static Map<String, Object> listToString(Map<String, Object> map) {
-        // 使用Stream API对原始Map进行处理
-        Map<String, Object> stringObjectHashMap = map.entrySet().stream().map(v -> {
-            // 检查当前元素的值是否为List类型
+        Map<String, Object> stringObjectHashMap = new HashMap<>(map);
+        stringObjectHashMap = stringObjectHashMap.entrySet().stream().map(v -> {
             if (v.getValue() instanceof List) {
-                // 将List类型的值转换为以逗号分隔的字符串
-                v.setValue(String.join(",", (List<String>) v.getValue()));
+                List<String> list = (List<String>)v.getValue();
+                v.setValue(String.join(",", list));
             }
-            // 返回转换后的Map.Entry对象
             return v;
         }).collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
-        // 返回转换后的Map
         return stringObjectHashMap;
     }