How to copy data of DTR from one to another

Recently I want to copy current DTR data to another,and I followed the guide https://cw.sdn.sap.com/cw/docs/DOC-106069.But I always get errors in DTR Console.The new error is:

Failed to set the state of the workspace targetID:/ws/TEST/exampler.org_TEST/dev/inactive to restricted

Can anyone help?