ORA-14646: Specified alter table operation involving

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ORA-14646: Specifiedalter table operation involving compression cannot be
performed in the presence of usable bitmap indexes
Cause: The first time a table is altered to includecompression, it cannot have a
usable bitmap index (partition). Subsequent alter table statements involving
compression do not have this same restriction.
Action: A)Drop any bitmap indexes defined on the table, and re-create them once
the operation is complete or, B) Mark all index fragments of all bitmap indexes
defined on the table UNUSABLE and rebuild them once the operation is complete.