neutron-db-manage failed with SQL error: Table 'agents' already exists

Scenario:
1. Revert snapshot with ready master node
2. Copy and install external-lb and detach-haproxy plugins
3. Bootstrap 3 slaves from default nodegroup
4. Create cluster with Neutron VXLAN and custom nodegroups
5. Run 'fuel-mirror' to replace cluster repositories with local mirrors
6. Bootstrap 2 slaves nodes from second nodegroup and one node from third node group
7. Enable plugins for cluster
8. Add 2 controllers from default nodegroup and 1 controller from second node group
9. Add 1 compute+cinder from default node group and 1 compute+cinder from second node group
10. Add haproxy node from third node group
11. Verify networks
12. Deploy cluster

Actual result:

Deployment has failed. All nodes are finished. Failed tasks: Task[primary-openstack-network-plugins-l2/1] Stopping the deployment process!

Astute log:
2016-10-25 04:09:48 INFO [27880] Cluster[]: All nodes are finished. Failed tasks: Task[primary-openstack-network-plugins-l2/1] Stopping the deployment process!

Puppet log on node-1:
2016-10-25T03:59:24.031269+00:00 notice: (/Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]/returns) Running upgrade for neutron
...
2016-10-25T03:59:24.077411+00:00 notice: (/Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]/returns) sqlalchemy.exc.OperationalError: (_mysql_exceptions.OperationalError) (1050, "Table 'agents' already exists") [SQL: u"\nCREATE TABLE agents (\n\tid VARCHAR(36) NOT NULL, \n\tagent_type VARCHAR(255) NOT NULL, \n\t`binary` VARCHAR(255) NOT NULL, \n\ttopic VARCHAR(255) NOT NULL, \n\thost VARCHAR(255) NOT NULL, \n\tadmin_state_up BOOL NOT NULL DEFAULT true, \n\tcreated_at DATETIME NOT NULL, \n\tstarted_at DATETIME NOT NULL, \n\theartbeat_timestamp DATETIME NOT NULL, \n\tdescription VARCHAR(255), \n\tconfigurations VARCHAR(4095) NOT NULL, \n\t`load` INTEGER NOT NULL DEFAULT '0', \n\tPRIMARY KEY (id), \n\tCONSTRAINT uniq_agents0agent_type0host UNIQUE (agent_type, host), \n\tCHECK (admin_state_up IN (0, 1))\n)ENGINE=InnoDB\n\n"]
2016-10-25T03:59:24.078628+00:00 err: (/Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]) Failed to call refresh: neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugin.ini upgrade head returned 1 instead of one of [0]

Env: 9.2-#430
https://product-ci.infra.mirantis.net/job/9.x.system_test.ubuntu.plugins.thread_separate_haproxy/104/testReport/(root)/separate_haproxy/separate_haproxy/