Auto clear alerts in UMP

Document ID : KB000100716
Last Modified Date : 12/06/2018
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Issue:
Hi team, there are some alerts that are not getting clear automatically e.g: Robot "xyz" is inactive. Despite the Robot is active. Is there any custom configuration to get the alerts auto-cleared or is this a defect? 
Environment:
UIM 8.51
Cause:
The alert in UMP and in the nas_alarms table but not in IM. 
It looks like the synch. when the alert got clear between nis bridge and the backend DB had a problem. 
The IM use it's own internal DB files, so this is why the alert was not in IM.
Resolution:
There's no way to synch. it so we had to delete the alert from the nas_alarms table using 
delete from nas_alarms where nimid like 'insert nimid value'