Since we previously did not support the IRR in our whois database, there were no mnt-routes attributes in inetnum/ine6num/aut-num objects. It was required to have these before adding route objects.
After the enhancements implemented on the AFRINIC IRR, you can now also authenticate via mnt-lower for the route creationIf you still want to add mnt-routes on your objects, please email irr@afrinic.net.