Comment 1 for bug 1696694

I'm not sure what the issue is here, but I don't think this is happening because of the network type parameters being added to network-environment.yaml.

The networks that Heat is trying to rebuild (Internal API, etc.) are not overcloud networks, those are networks defined on the Undercloud instance of Neutron. The NeutronNetworkType and TunnelTypes parameters only affect the overcloud Neutron.

So something is trying to rebuild all the internal networks. The instructions that I've seen for upgrading specify to use "openstack overcloud update" rather than "openstack overcloud deploy". Could that be causing the issue? I know this is for a previous version, but see here:
https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/9/html-single/upgrading_red_hat_openstack_platform/