An insufficient or ancient Obsoletes tag has been discovered in the package. It should either be corrected or dropped. The tag is superfluous, because it doesn't obsolete a package found in Fedora 16 and newer, and that package is ancient: openbabel-0:2.3.0-5.fc16.i686 is oldest openbabel < 0:2.3.0-1 obsoleted by openbabel-libs-0:2.3.2-2.fc20.i686 [semi-automated bug report]
Fix committed to rawhide, build pending.
This was fixed in F21+.