[Bug] [Api] Using the TaskDefinitionController-save-single interface can lead to duplicate predecessor tasks.

[xiaoqisu777]

Search before asking

• I had searched in the issues and found no similar issues.

What happened

Use this API

Adding a task adds an additional front-end node,


If too many tasks are added, it can cause the workflow details to get stuck when opening.

What you expected to happen

I expect each task to have only one predecessor node,
like this

How to reproduce

use this api >1 time ,you can reproduce the problem

Anything else

No response

Version

dev

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[ruanwenjun]

Please don't use the task page to create new task, there is a lot of bugs here, we don't want to change the code here, unless you want to refactor the whole process.