Applying a minor vCenter 8.0 update using the vCenter 8.0 iso installer produces the following error:
Source machine version is 8 and this installer is 8.0
Supported versions for upgrade are 6.7 and 7.0
vCenter Server 8.X
Minor updates to the vCenter appliance should be applied via patch ISO ending in "-FP.iso" , and cannot be applied with the upgrade iso installer.
Use the instructions in the article linked below to apply minor version updates to vCenter Server Appliance
Patching/Updating VMware vCenter Server Appliance VCSAs