I've a single CCM 126.96.36.1990-3, and when I make changes on configuration of devices, they doesn't apply.
I've checked the RTMT and the only alert is DBreplication failure. The detail is:
On Wed Jan 28 14:10:11 CLST 2009 on node x.x.x.x. DBReplicationFailure occured . There were errors in CallManager database replication. Reason code: Number of replicates created is not correct.
I've resetted the server and the changes have become applied, but when I make new ones they doesn't apply.
I've made a utils dbreplication repair all, but it didn't provide any solution.
sounds a lot like this issue:
CUCM cannot reset phones or make changes
if this helps, please rate