Error encountered during upgrade from NW7.11 (BPM) to NW7.3

Dear Experts:

During upgrade execution step, the following error has occurred:

Already deployed component has version:1000.7.30.5.0.20111002210600 1.

Contains Aborted deployment component:

sap.com_tc_bpemcontent_predefsdefault Deployment of

archive /usr/sap/trans/EPS/in/BPEMCONTENT05_0-10007994.SCA -->

sap.com_tcbpem_contentpredefs~default.sda for component

sap.com/tc_bpemcontent_predefsdefault aborted Detailed message:

com.sap.glx.repository.exceptions.RuntimeRepositoryException: RTRep> no

handler for file: gen_bpm/text/tasks/defaulttask.csv_th.xlf Please

check if all services are up and running.

System information:

OS: Suse Linux 10.3 x86_64

DB: SAP MAXDB 7.802

Source Software version: NW7.11 SPS04

Target Software version: NW7.3 SPS05

The following is from defaultTrace. It seems that RR handler manager failed to start due to duplicate key; however, no related table/index was mentioned in the log..

com.sap.glx.rrhandlermanager.svc cannot be started due to:

com.sap.engine.frame.ServiceException: Failed to migrate IndexManagement tables

........

Caused by: com.sap.bpem.base.exception.BPEMBaseException: Failed to

migrate IndexManagement tables

........

Caused by: com.sap.sql.exception.

OpenSQLIntegrityConstraintViolationException: 200: Duplicate key

........

Caused by: com.sap.dbtech.jdbc.exceptions.jdbc40.

SQLIntegrityConstraintViolationException: 200: Duplicate key

Any help would be appreciate, Thank you