Hi
Best solution is to delete data from FIAP Cube and DSO if your client/Business approves and reload data in non business hours. The best part is with initialization you don't have to shut the users in ECC as in case of LO extraction.
If this is not the option check if you can load the data from DSO to DSO within loop and make changes to records the way you want, just one time job.
Regards,
Kamlesh