ORA-14256: invalid resulting partition description(s)

admin

ORA-14256: invalidresulting partition description(s)
Cause: User specified STORE-IN clause, SUBPARTITIONS clause,and/or
<subpartition-description> clause in partition description(s) in ALTERTABLE
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: Removeinvalid clause(s), or ensure that the table is partitioned by
Composite Range method