ORA-00955: name is already used by an existing object

Hi All,
We are getting the below error while applying cpu  patch 14321240 in 11.5.10.2 with AIX 5.3
Please suggest the solution for this.

- ATTENTION: All workers either have failed or are waiting:

            FAILED: file povnd.odf    on worker  1.

            ATTENTION: Please fix the above failed worker(s) so the manager can continue.

            adwork001.log
            ==============
   
            CREATE OR REPLACE SYNONYM APPS.PO_VENDORS FOR PO.PO_VENDORS

            AD Worker error:
            The following ORACLE error:

            ORA-00955: name is already used by an existing object


            occurred while executing the SQL statement:

            CREATE OR REPLACE SYNONYM APPS.PO_VENDORS FOR PO.PO_VENDORS

            AD Worker error:
            Unable to compare or correct tables or indexes or keys