ORA-12839: cannot modify an object in parallel

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ORA-12839: cannotmodify an object in parallel after modifying it
Cause: Within the same transaction, an attempt was made toperform parallel
modification operations on a table after it had been modified. This is not
permitted.
Action: Rewritethe transaction or break it up into two transactions: one
containing the parallel modification and the second containing the initial
modification operation.