R12.1.3 : PORCPTWF PACKAGE BODY IS INVALID

Hi,
-package body was invalid, checked versions

select text from dba_source where line=2 and name='PORCPTWF';

TEXT
--------------------------------------------------------------------------------
/* $Header: PORCPWFS.pls 120.0 2005/06/01 20:47:30 appldev noship $*/
/* $Header: PORCPWFB.pls 120.20 2007/10/22 04:29:18 pilamuru noship $*/


adident Header $PO_TOP/patch/115/sql/PORCPWFS.pls
/home/ebs/TEBS/apps/apps_st/appl/po/12.0.0/patch/115/sql/PORCPWFS.pls:
$Header PORCPWFS.pls 120.0 2005/06/01 20:47:30 appldev noship $


adident Header $PO_TOP/patch/115/sql/PORCPWFB.pls
/home/ebs/TEBS/apps/apps_st/appl/po/12.0.0/patch/115/sql/PORCPWFB.pls:
$Header PORCPWFB.pls 120.20 2007/10/22 04:29:18 pilamuru noship $


-found note

Confirm Receipt Workflow Sents Notification To The Buyers For Complex Purchase Orders (Doc ID 1532652.1)


-installed patch 15921367
-versions after patch