What is going on in package "ibus-typing-booster"?
http://pkgs.fedoraproject.org/cgit/ibus-typing-booster.git/plain/ibus-typ...
It attempts at obsoleting various packages, but since it does that with a
specific dist tag and without retiring those packages, it fails entirely,
because the packages have been bumped and rebuilt several times.
http://fedoraproject.org/wiki/Package_Renaming_Process
https://fedoraproject.org/wiki/How_to_remove_a_package_at_end_of_life
If you need help, feel free to contact me.
Once the supposed to be retired packages have been blocked by rel-eng,
it becomes easier to determine the necessary Obsoletes versions.