Hi Rajesh Behera,
As you are facing the issue at the ECC side already please to solve this in your bw and ECC system take in consideration the recommendations below:
http://scn.sap.com/people/paulo.junior/blog/2010/11
739863 Repairing data in BW
978089 (LIS/BW-BCT: Reproducible example requested)
Those notes and the blog will help you to better understand what is happening and also will help you to find the solution for this matter.
Thanks and best regards,
Fellipe Christ