Oracle Solution for Error ora-14211

ORA-14211: subpartition bound must collate higher than that of the last subpartition

What triggered the Error:

Subpartition bound specified in ALTER TABLE MODIFY PARTITION ADD SUBPARTITION statement did not collate higher than that of the partition's last subpartition.

What should we do to fix it:

Ensure that the subpartition bound of the subpartition to be added collates higher than that of the table partition's last subpartition.