Hi Phani,
Please check the DTP selections (when loaded manaully) and the one maintained in DTP in the process chain.
Another thing is :
When you delete the bad request from target and before repeating your DTP in process chain, make sure the bad request deleted from table RSBKREQUEST also.
If you find the same request in table, first delete the request from table and repeat the DTP in process chain.
I believe delete overlapping should work now.
Thanks
Neha