Oracle : Ошибка ORA-12829

"Deadlock - itls occupied by siblings at block %s of file %s"
*Cause: parallel statement failed because all itls in the current
block are occupied by siblings of the same transaction.
*Action: increase MAXTRANS of the block or reduce the degree of
parallelism for the statement. Reexecute the statement.
Report suspicious events in trace file to Oracle Support
Services if error persists.

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