Oracle Message ORA-12839 - cannot modify an object in parallel after modifying it

ERRORcannot modify an object in parallel after modifying it
CAUSEWithin the same transaction, an attempt was made to perform parallel modification operations on a table after it had been modified. This is not permitted.
ACTIONRewrite the transaction or break it up into two transactions: one containing the parallel modification and the second containing the initial modification operation.