ENM Monitoring shows alarms with "Unknown" in the Event Source

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Issue
ENM Monitoring detects alarms with an Event Source that includes Unknown. For example, Unknown.MV_1_2_GEN_A.

Product Line
PSO 8.1, 8.2
ENM 8.3.x

Environment
ENM

Cause
The Schneider Electric CoreServiceHost has been refreshed to see new alarms

Resolution
1. Stop the Schneider Electric CoreServiceHost service.
2. Wait 10 seconds
3. Start the Schneider Electric CoreServiceHost service