About Orchestrator publishing error

orchestrator
error
publishing

#1

Hello.
I use Orchestrator CE.
A certain robot doesn’t work well for publishing from today with the error pop-up below:
Error: System.ApplicationException: Publish of workflow project to Orchestrator failed. Error creating UiPath.Core.Model.Package.UiPackage. Duplicate Reference. —> System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]: Error creating UiPath.Core.Model.Package.UiPackage. Duplicate Reference.

This happens to the certain robot and others can work well with no problem.
I tried to use another PC to publish and it doesn’t work well.

I want to know why this happens and please tell me how to solve.