We are seeing duplicate UIM alarms on duplicate EventModels in different landscape.
Release : Any
Component : Spectrum UIM Integration
For this particular issue, the user had both the spectrumgtw probe and two snmpgtw probes configure to send UIM alarms to Spectrum.
The two snmpgtw probes were disabled and the EventAdmin and Eventmodel models were deleted from the other landscape. At the next alarm sync, UIM and Spectrum were showing the same number of alarms. No more duplicate EventModels or alarms seen after.