yum update aborts firefox update

the current version of firefox is 24.2.0 it would appear from the id of the update (firefox-24.2.0-1.el5_10.i386) that its the same that's already imstalled ?

if so how do I  update the system so it doesn't try to intall this update in the future  ??

[root@BANWEBLOGIC2 ~]# yum update
Loaded plugins: rhnplugin, security
This system is receiving updates from ULN.
Skipping security plugin, no data
Setting up Update Process
Resolving Dependencies
There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them.
The program yum-complete-transaction is found in the yum-utils package.
Skipping security plugin, no data
--> Running transaction check