yum 캐시가 쌓이거나 충돌이나면 아래와같이 에러가 발생하는듯 보임.
에러구문 발생
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).
해결방안
yunm clean all
yum-complete-transaction --cleanup-only