Hi Raju,
Before you make any changes in the logistics data source the system check for any data in the set up table, V3 unprocessed records an the queues. All of these should not contain any data.
You can run the report RMCEXCHK. This report will check and tell if all the coditions for the change in structure are being fulfilled or not.
if everythings is green when you run the report, that implies that you can go ahead with the changes.
Regards,
Saurabh Ojha