How to break the link from User to Associated Worker?

Summary

How to break the link from User to Associated Worker?

Content

We are planning to import all Employees into Fusion. For this we are planning to Load Worker.dat from PeopleSoft legacy system. The problem we are facing is if any Oracle User already in Oracle Cloud which associated to a Person/Worker then with the new employee/worker load is not allowing us to associate original Oracle User record to newly created Person/Worker. From the Person Management screen Oracle does not allow to associate a user which is already associated to an old person record or it allows to remove the link from User screen.