Description of problem: Fedora 20 contains apt-0.5.15lorg3.95-10.git522.1.fc20 while in F21, the release is only -9 which is lower thus breaking the update path
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
apt-0.5.15lorg3.95-17.git522.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/apt-0.5.15lorg3.95-17.git522.fc21
Package apt-0.5.15lorg3.95-17.git522.fc21: * 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 apt-0.5.15lorg3.95-17.git522.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-3829/apt-0.5.15lorg3.95-17.git522.fc21 then log in and leave karma (feedback).
apt-0.5.15lorg3.95-17.git522.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.