Oracle Message ORA-14262 - new subpartition name must differ from the old subpartition name

ERRORnew subpartition name must differ from the old subpartition name
CAUSEUser entered ALTER TABLE/INDEX RENAME SUBPARTITION specifying which is identical to the name of the subpartition being renamed
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