When performing the FFU on compute services data plane it refers to a test VM that it is assuming that it exists, when in nowhere in the guide is described how to create it.

In section: 

https://docs.redhat.com/en/documentation/red_hat_openstack_services_on_openshift/18.0/html-single/adopting_a_red_hat_openstack_platform_17.1_deployment/index#performing-a-fast-forward-upgrade-on-compute-services_data-plane

Steps 9, 10 and 11 are the impacted steps.