ORA-14256: invalid resulting partition description(s)

oracle

ORA-14256: invalid resulting partition description(s)
Cause: User specified STORE-IN clause, SUBPARTITIONS clause, and/or <subpartition-description> 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

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