ORA-12839: Cannot Modify An Object In Parallel After Modifying It

SOLUTION :

We need to issue, COMMIT or ROLLBACK, before running that parallel DML query.

SQL> delete /*+ parallel (test) */ from test;
delete /*+ parallel (test) */ from test
*
ERROR at line 1:
ORA-12839: cannot modify an object in parallel after modifying it


SQL> commit;

Commit complete.

SQL> delete /*+ parallel (test) */ from test;

1319795 rows deleted.