ORA-14266: data type or length of an index subpartitioning column may not be changed

ORA-14266: data type or length of an index subpartitioning column may not be changed

Cause: User issued ALTER TABLE statement attempting to modify data type and or or length of a column used to subpartition some index defined on the table named in ALTER TABLE statement, which is illegal

Action: Avoid modifying data type and or or length of index subpartitioning column(s)