After successfully removing Directory Services from an old NW 6.5 SP5
server all objects are remove from the tree except for the servers sys

I tried to manually delete the sys volume object by I get this error

(Error -646) Invalid naming properties were used. Use a different set of
characters. If the error persists, contact a NetWare support provider.

The object "SERVER_SYS" could not be deleted.

Has anyone seen this happen before?