Solution : https://service.sap.com/sap/support/notes/206659 (SAP Service marketplace login required)
Key words :
additional key words quality notification, choose -> 'edit / assign element group', select external/internal number assignment, maintain number range groups, internal number assignment, choose -> 'group / maintain', number range group, maintaining number ranges, current number level, number range - notification
Related Notes :
52390 | Transport of number ranges with group |