Comment 4 for bug 1632131

I double checked with product management, below is the official statement about UCA support:

Mirantis provides Ubuntu UCA support as part of our upstream community strategy. The UCA packages differ significantly from time to time and are not controlled by Mirantis, so Mirantis can't make promises about the stability of those packages. As a result we do not provide support for UCA packages. All Mirantis paid support customers should use the Mirantis OpenStack packages which we control and to which we can provide Maintenance Updates.

So I am confirming this bug for MOS 9.2, an option to deploy UCA packages should be disabled.
Nominating for Fuel project to fix the issue in upstream.