Oracle Message ORA-14256 - invalid resulting partition description(s)

ERROR	invalid resulting partition description(s)
CAUSE	User specified STORE-IN clause, SUBPARTITIONS clause, and/or clause in partition description(s) in ALTER TABLE SPLIT PARTITION or ALTER TABLE MERGE PARTITIONS statement but the table in the maintenance operation is not a Composite Range partitioned table which is illegal
ACTION	Remove invalid clause(s), or ensure that the table is partitioned by Composite Range method