I deleted a SNMP device from USM so why do I still receive alarms for it?

Document ID : KB000076799
Last Modified Date : 12/04/2018
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Why do I still get pollagent alarms such as "<hostname> HAS STOPPED RESPONDING" for a SNMP device that I deleted from the USM inventory?
The alarm was raised by snmpcollector (who's alarms come in as pollagent) as the corresponding profile was not removed after the device was deleted from USM. If you delete a device from the USM you need to manually delete it's profile from the probe(s) that monitored this device, there is no functionality to also remove these profiles automatically.