Copying or moving a document with the same name results in a unclear message

Moving a document with the same name to a folder, results in the following message: the action failed. / de actie is mislukt.

This is a non user friendly message, while the stacktrace clearly tells you what is wrong:

org.hippoecm.repository.api.WorkflowException: Cannot move document when document with same name exists

The same goes for copying a document with the same name.