Solution : https://service.sap.com/sap/support/notes/152713 (SAP Service marketplace login required)
Key words :
additional key words, 'additional values' indicator, attached advance corrections, master data, user input, restrictable characteristic, characteristic, constraint, justification, 'constraint'
Related Notes :
| 178887 | Inconsistency w/ charac. which can be restricted |
| 137586 | Default values for restrictable characteristics |