If the file system being relocated was the original Mac client's only
significant file system, then a REName Node would be the best course
of action, then doing a fresh REGister Node for the original Mac, and
deleting inconsequential filespaces from the renamed node, where the
original Mac will do (lesser) backups afresh.

Where there is external storage which may move around, using a
dedicated, virtual nodename for its backup can make more sense over
time.

   Richard Sims