When you import an installer ISO for ESX 9.0 to vSphere Lifecycle Manager in vCenter Server 8.0, it fails with the error like below.
An error is recorded in /var/log/vmware/vmware-updatemgr/vum-server/vmware-vum-server.log:
YYYY-MM-DDThh:mm:ss.sssZ error vmware-vum-server[#####] [Originator@#### sub=metadataParser] [metadataParser ###] Package version is not supported
vCenter Server 8.0
ESX 9.0
This is expected behavior. The installer ISOs for ESX 9.0 are compatible only with vCenter 9.0 or later.
Upgrade vCenter Server 8.0 to vCenter 9.0 or later.