Helen,
According to your feedback, the time difference of an NTP server is 120s. The time difference of the NTP server of FusionCompute exceeds the 60s and cannot be synchronized again.
You can check whether a VM exists on the server. If no VM exists, run the following command to forcibly synchronize the VM.
servicentpd stop; ntpdate ntp-server IP
After executing the command and waiting for 5 mins the alarm will disappear or use the command to check the status again.
ntp time-delta –host all
Hope this helps!