I understand that Old material number is at client level in Material master. Our client has 21 plants and each plant has its own legacy system. Hence they have different Old material numbers plantwise. This Oldmaterialnumber is to be tracked in the system, till cutover phase, since initial stock upload will be done based only on this. Is there any field in Purchasing or anyother Plant specific views, to populate this data. Ifany of you have come across this scenario, please let us know. We wish to avoid developments on this front.