After the Unix agent has been deleted, it cannot be recreated.
The following error appears in the Foglight Agent Manager FGLAM log files:
VERBOSE [FglAM:IncomingMessage[5]-2761] com.quest.glue.core.comms.handlers.DeleteAgentListener - Deleting agent instance HostAgents/UnixAgentPlus/Monitor@xx.xx.xx.xx [5.9.5-5.9.5-201907230822-RELEASE-71].
VERBOSE [FglAM:IncomingMessage[5]-2761] com.quest.glue.core.comms.handlers.AbstractAgentLockMessageHandler - Could not acquire an Agent WRITE Lock from Monitor@xx.xx.xx.xx needed before we can process the com.quest.glue.messages.schema.v1_0.DeleteAgent message [msgId: 8d418340-993d-4ee0-aa52-2c683834ee54]. Will re-attempt lock acquisition in 9,000ms.