Collector Host is reporting an 'Error-2' in the Collector Host field of the event.
Event Example:
Source
Agent Name <name of agent>
Host Name <name of host>
Host IP <IP of host>
Agent Version 6.9.3.2560 or 6.10
OS Type Linux
OS Version 3.10.0-1160.119.1.el7.x86_64
Agent Type Derived (OS Forwarded)
Collector Host NAME=<hostname> Error-2
DGEN events were not getting the VIRTUAL tag added to them.
Upgrade the collector host agent to 6.9.3.2579 or 6.10.0.9623