data cleanup for table SRRELROLES in SAP CRM

Hi Experts,

need your suggestion to clean up the data from table SRRELROLES in sap crm system. currently this table is holding 400 million records and growing rapidly. our aim is to clean up the old records but I am not very much sure as how to do this. I Have checked program RSRLDREL, RSRLDREL2 and RSRLDREL3 program but don't see much useful or may be i might not have used the program correctly.

please note that we are transmitting the ISU data from ECC to CRM system.

below are the break ups of total records in table:

Object Type          Count

BUS2000126          190, 961, 605

BCONTACT             10,515, 960

BUS1006130            4, 836, 420

CRMCICANCH         77,113,344

BUS2080                 7,665,3424

I think deleting the BUS2000126 data will reduce more than 50% of load. Could you please suggest if there is any way to clean up these records?

Thanks in advance..!!!

Thanks,

Rajesh K Sahu