ORA-14298: LOB column block size mismatch

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ORA-14298: LOB columnblock size mismatch in ALTER TABLE EXCHANGE
[SUB]PARTITION
Cause: The block sizes of a pair of corresponding LOB columnsof the two tables
specified in the ALTER TABLE EXCHANGE [SUB]PARTITION statement are
different.
Action: Ensurethat the block sizes of corresponding pairs of LOB columns of the
tables involved in the ALTER TABLE EXCHANGE [SUB]PARTITION statement
are the same.