The target is ESXi 7.0.2 and all the hosts under the old VCenter are 6.5 or 6.7.

I created no hostprofiles.

The target VCSA is part of Essentials 7 license, but I the installer/upgrader hasn't even gotten to ask about the target for the install yet -- this is just an error in connecting to the existing VCSA appliance and it's host.