lordk911 commented on issue #8790:
URL:
https://github.com/apache/dolphinscheduler/issues/8790#issuecomment-1098620438
dolphinscheduler 引入工作流版本控制后，出现工作流无法保存的问题修复：
异常信息：
Duplicate key TaskDefinition{id=0, code=3755309816211, name='zjcz_stage2',
version=3, description='', projectCode=0, userId=0, taskType=DEPENDENT,
taskParams='{"dependence":{"relation":"AND","dependTaskList":[{"relation":"AND","dependItemList":[{"projectCode":3755309710848,"definitionCode":3755309717380,"depTaskCode":0,"cycle":"day","dateValue":"today"}]}]},"conditionResult":{"successNode":[],"failedNode":[]},"waitStartTimeout":{"strategy":"FAILED","interval":null,"checkInterval":null,"enable":false},"switchResult":{}}',
taskParamList=null, taskParamMap=null, flag=YES, taskPriority=MEDIUM,
userName='null', projectName='null', workerGroup='default', failRetryTimes=0,
environmentCode='-1', failRetryInterval=1, timeoutFlag=CLOSE,
timeoutNotifyStrategy=WARN, timeout=0, delayTime=0, resourceIds='null',
createTime=null, updateTime=null}
当时页面的URL：
http://a.b.c.d:12345/dolphinscheduler/ui/#/projects/3755309710848/definition/list/3755309717382
以上信息说明：
在保存项目3755309710848，工作流 3755309717382 时发生了主键冲突异常，注意该主键异常并非数据库主键，具体发生重复的任务是
3755309816211,版本号是3.
解决这个问题，到表t_ds_process_task_relation中查看一下当前工作流（3755309717382）的版本
以及所关联的任务（3755309816211）的版本，应该不是3，
然后到表 t_ds_process_task_relation_log 中查询一下 当前工作流（3755309717382），当前版本
，所关联的任务（3755309816211）的信息，把版本不是3的删掉即可。
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