R12.1.3 ; FAILED: file EGOEXTUPG.sql on worker 1 for product ego username EGO.

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Hi,While applying the patch 13881020 it fails at script EGOEXTUPG.sql

Log files are showing

File name : 13881020_100813-new.log
------------------------------
 FAILED: file EGOEXTUPG.sql on worker  1 for product ego username EGO.

Time is: Tue Oct 08 2013 11:35:26


File name : adwork001.log
-------------------------------
sqlplus -s APPS/***** @/.../appl/ego/12.0.0/patch/115/sql/EGOEXTUPG.sql &un_ego &pw_ego
Connected.

Session altered.

DECLARE
*
ERROR at line 1:
ORA-12801: error signaled in parallel query server P015
ORA-00001: unique constraint (EGO.EGO_MTL_SY_ITEMS_EXT_B_U2) violated
ORA-06512: at line 388


Thank you.