SbloodyS commented on a change in pull request #8309:
URL: https://github.com/apache/dolphinscheduler/pull/8309#discussion_r801704827



##########
File path: 
dolphinscheduler-service/src/main/java/org/apache/dolphinscheduler/service/process/ProcessService.java
##########
@@ -2416,7 +2416,13 @@ public int saveTaskRelation(User operator, long 
projectCode, long processDefinit
         Map<Long, TaskDefinitionLog> taskDefinitionLogMap = null;
         if (CollectionUtils.isNotEmpty(taskDefinitionLogs)) {
             taskDefinitionLogMap = taskDefinitionLogs.stream()
-                    .collect(Collectors.toMap(TaskDefinition::getCode, 
taskDefinitionLog -> taskDefinitionLog));
+                    .collect(
+                        Collectors.toMap(
+                            TaskDefinition::getCode,
+                            taskDefinitionLog -> taskDefinitionLog,
+                            (entityOld , entityNew) -> entityOld

Review comment:
       ![](https://vip2.loli.io/2022/02/08/vsGeKqj5m48gBS7.png)
   
   In the production environment where I upgraded from 2.0.2-release to 
2.0.3-release, when entering the workflow definition modification content from 
the workflow instance, the front end would send two identical data, which 
caused this error. However, I am currently unable to reproduce this problem in 
standalone mode. It makes me confused.




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