To Reproduce Steps to reproduce the behavior:
During RHOSP 16.2 -> RHOSP 17.1.6 FFU a customer moved 5 nodes from old RHEL 8 - based role to a new RHEL 9 role. Workarounds for https://issues.redhat.com/browse/OSPRH-16632 and https://issues.redhat.com/browse/OSPRH-17065 were applied. Nonetheless, upgrade prepare command is blocked by failed ansible play:

2025-09-03 13:30:59.724637 | 566f2db9-002a-77a5-45e2-000000001173 |      FATAL | Render out the hosts entries | COMPUTE | error={"msg": "The task includes an option with an undefined variable. The error was: 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'hostname_resolve_network'. 'ansible.vars.hostvars.HostVarsVars object' has no attribute 'hostname_resolve_network'\n\nThe error appears to be in '/usr/share/ansible/roles/tripleo_hosts_entries/tasks/main.yml': line 51, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n- name: Render out the hosts entries\n  ^ here\n"}

Inventory looks consistent, all entries in /home/stack/overcloud-deploy/overcloud/config-download/overcloud/host_vars/ folder have non-empty hostname_resolve_network.

Latest overcloud-deploy folder is attached to the case.

Expected behavior
Upgrade prepare command is not blocked when documentation followed properly.

Bug impact
A process of moving nodes between the roles is blocked.

Known workaround
None.