When this problem occurs, Flow Graph will not be able to run normally. You must close Unity and reopen it.
1. Modify a Unit name or this namespace, without the 'RenamedFrom' attribute.1.3 Delete unit can also
2. Return to Unity and select the flow Macro containing this unit. This error will occur. Then click on other Macro files and you will find that Flow Graph is not working.Then your Graph looks like this, blank
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