Solution : https://service.sap.com/sap/support/notes/625738 (SAP Service marketplace login required)
Key words :
select 'change database table usr21s', usr21s database table, start menu settings, terms usr21-start_menu, start transaction se11, client copy, bas_clientcopy reason, program error, solution create, required field
Related Notes :
| 355713 | CC-TOPIC: User masters during client copy |
| 161495 | CC-RELEASE: Error in client copy in 4.6A and 4.6B |