Solution : https://service.sap.com/sap/support/notes/1043321 (SAP Service marketplace login required)
Key words :
subsequently fill field userid, avoid losing data, table /dbm/ord_svar_t, table /dbm/ord_svar, avoid data loss, table /dbm/ord_svaval, transaction /dbm/order, user-specific variants, extended order search, order search variants
Related Notes :
969602 | Current Release Restrictions for DBM 6.0 |