Red Hat OpenStack Platform template update run fails with: cinder-manage db sync returned 1 instead of one of [0]

Issue

Red Hat OpenStack Platform template update run fails with: cinder-manage db sync returned 1 instead of one of [0]

[stack@undercloud-7 ~]$ openstack stack failures list overcloud
(...)
  deploy_stderr: |
    ...
    Warning: Scope(Class[Nova::Keystone::Authtoken]): Could not look up qualified variable '::nova::api::admin_user'; class ::nova::api has not been evaluated
    Warning: Scope(Class[Nova::Keystone::Authtoken]): Could not look up qualified variable '::nova::api::admin_password'; class ::nova::api has not been evaluated
    Warning: Scope(Class[Nova::Keystone::Authtoken]): Could not look up qualified variable '::nova::api::admin_tenant_name'; class ::nova::api has not been evaluated
    Warning: Scope(Class[Nova::Keystone::Authtoken]): Could not look up qualified variable '::nova::api::auth_uri'; class ::nova::api has not been evaluated
    Warning: Scope(Class[Nova::Keystone::Authtoken]): Could not look up qualified variable '::nova::api::auth_version'; class ::nova::api has not been evaluated
    Warning: Scope(Class[Nova::Keystone::Authtoken]): Could not look up qualified variable '::nova::api::identity_uri'; class ::nova::api has not been evaluated
    Warning: Scope(Class[Ceilometer]): Both $metering_secret and $telemetry_secret defined, using $telemetry_secret
    Warning: Scope(Haproxy::Config[haproxy]): haproxy: The $merge_options parameter will default to true in the next major release. Please review the documentation regarding the implications.
    Error: /Stage[main]/Cinder::Db::Sync/Exec[cinder-manage db_sync]: Failed to call refresh: cinder-manage  db sync returned 1 instead of one of [0]
    Error: /Stage[main]/Cinder::Db::Sync/Exec[cinder-manage db_sync]: cinder-manage  db sync returned 1 instead of one of [0]
    (truncated, view all with --long)