Some VCAIM Hosts are not updating in Spectrum when being removed\renamed.
Release : 21.x
Component : Spectrum Core / SpectroSERVER
Check if Retain SNMP-enabled Virtual Machines During VMware Manager Deletion is enabled:
The Retain SNMP models setting means there is no value in virtualentityid attribute for these models which means it's not being managed by VCAIM post discovery.