Solution : https://service.sap.com/sap/support/notes/1594295 (SAP Service marketplace login required)
Key words :
role import screen select 'skip' option, role import screen display, master roles existing prior, error 'master role <role>, import derived roles, prerequisites brm expects, 'role authorization source', 'skip' option, master role, master roles
Related Notes :
| 1576321 | Import derived role without master role |