Error
There are unfinished transactions remaining. You might consider running yum-complete-transaction, or “yum-complete-transaction –cleanup-only” and “yum history redo last”, first to finish them. If those don’t work you’ll have to try removing/installing packages by hand (maybe package-cleanup can help).
Resolution
Run the following commands in root;
/usr/bin/yum clean all
/usr/sbin/yum-complete-transaction
If yum-complete-transaction is not found please run (in root);
yum install yum-utils