ORA-08118: Deferred FK constraints cannot be enforced, index too big (string)

ORA-08118: Deferred FK constraints cannot be enforced, index too big (string)


Cause:


Deferred Foreign Key constraints cannot be enforced due to the index key being too big and built on a non-default DB_BLOCK_SIZE.



Action:


First try to drop the Foreign Key and then the primary key.