I installed Kolla-Ansible release 12.0.0, i.e. wallaby on multinode setup, and then downgraded Kolla-Ansible to release 11.0.0, i.e. Victoria, following the below-mentioned link:

I downgraded Kolla-Ansible by running the command "pip install --upgrade kolla-ansible==6.0.0" and, changing "openstack_release: victoria" in globals.yml. But, "kolla-ansible upgrade" failed with the below error (Error also attached in the mail)  :

"alembic.util.exc.CommandError: Can't locate revision identified by 'wallaby_contract01'"

Could you please suggest if the downgrade is supported in Kolla-Ansible?

Best Regards,

Richa Gupta