Message Oracle ORA-14263 - new subpartition name must differ from that of any other subpartition of the object

ERRORnew subpartition name must differ from that of any other subpartition of the object
CAUSEUser entered ALTER TABLE/INDEX RENAME SUBPARTITION specifying which is identical to the name of some existing subpartition of the object
ACTIONEnsure that the new subpartition name is different from the name of any (including the one being renamed) existing subpartition of a given table or index