Description of problem: generic-release-21-5 requires generic-release-rawhide which enables rawhide. Seems either it should not require it, or generic-release-rawhide-21 should not have the rawhide repo enabled by default.
generic-release-21-6 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/generic-release-21-6
Package generic-release-21-7: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing generic-release-21-7' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-13475/generic-release-21-7 then log in and leave karma (feedback).
generic-release-21-7 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.