Oracle Solution for Error ora-02471

Solution for Oracle Error ORA-02471

ORA-02471: SYSDATE, UID, USER, ROWNUM, or LEVEL incorrectly used in hash expre\ssion.

What triggered the Error:

SYSDATE, UID, USER, ROWNUM, or LEVEL are not allowed in hash expression\s.

What should we do to fix it:

Recreate the cluster and remove the offending keywords.