ceph.spec includes License: (LGPLv2.1 or LGPLv3) and CC-BY-SA-3.0 and GPLv2 and Boost-1.0 and BSD and MIT But LGPLv2.1 is not a valid short name according to https://fedoraproject.org/wiki/Licensing:Main It should be either GPLv2+ or GPLv2 (depending on the actually license text).
fixed in ceph-16.2.7-2