Solution : https://service.sap.com/sap/support/notes/117612 (SAP Service marketplace login required)
Key words :
additional key words characteristic, relevant procedure/action, unauthorized model change, attached advance corrections, symptom values, object dependencies, characteristic values, author 'user', input exists, input status
Related Notes :
| 171506 | Assigned value when you create with reference |
| 126932 | Incorrect author information / lost values |
| 126623 | Interval values in characteristic value assignment |
| 120803 | Values frm procedure/action cannot be deleted-part2 |