[ INFO  ] Yum Verify: 100/100: ovirt-engine-tools.noarch 0:4.1.9.1-1.el7.centos - ud
[ INFO  ] Stage: Misc configuration
[ INFO  ] Upgrading CA
[ INFO  ] Installing PostgreSQL uuid-ossp extension into database
[ INFO  ] Creating/refreshing DWH database schema
[ INFO  ] Configuring WebSocket Proxy
[ INFO  ] Creating/refreshing Engine database schema
[ INFO  ] Creating/refreshing Engine 'internal' domain database schema
          Unregistering existing client registration info.
[ INFO  ] Creating default mac pool
[ ERROR ] Failed to execute stage 'Misc configuration': insert or update on table "mac_pool_ranges" violates foreign key constraint "mac_pool_ranges_mac_pool_id_fkey"
         DETAIL:  Key (mac_pool_id)=(58ca604b-017d-0374-0220-00000000014e) is not present in table "mac_pools".
         CONTEXT:  SQL statement "INSERT INTO mac_pool_ranges (
                 mac_pool_id,
                 from_mac,
                 to_mac
                 )
             VALUES (
                 v_mac_pool_id,
                 v_from_mac,
                 v_to_mac
                 )"
         PL/pgSQL function insertmacpoolrange(uuid,character varying,character varying) line 3 at SQL statement
         
[ INFO  ] Rolling back to the previous PostgreSQL instance (postgresql).
[ INFO  ] Stage: Clean up
          Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20180927090017-97fd5u.log
[ INFO  ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20180927090149-setup.conf'
[ INFO  ] Stage: Pre-termination
[ INFO  ] Stage: Termination
[ ERROR ] Execution of setup failed
('FATAL Internal error (main): insert or update on table "mac_pool_ranges" violates foreign key constraint "mac_pool_ranges_mac_pool_id_fkey"\nDETAIL:  Key (mac_pool_id)=(58ca604b-017d-0374-0220-00000000014e) is not present in table "mac_pools".\nCONTEXT:  SQL statement "INSERT INTO mac_pool_ranges (\n        mac_pool_id,\n        from_mac,\n        to_mac\n        )\n    VALUES (\n        v_mac_pool_id,\n        v_from_mac,\n        v_to_mac\n        )"\nPL/pgSQL function insertmacpoolrange(uuid,character varying,character varying) line 3 at SQL statement\n',)

lago.ssh: DEBUG: Command 483aadd2 on lago-upgrade-from-prevrelease-suite-4-2-engine  errors:
 Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/otopi/__main__.py", line 88, in main
    installer.execute()
  File "/usr/lib/python2.7/site-packages/otopi/main.py", line 157, in execute
    self.context.runSequence()
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 771, in runSequence
    util.raiseExceptionInformation(infos[0])
  File "/usr/lib/python2.7/site-packages/otopi/util.py", line 81, in raiseExceptionInformation
    exec('raise info[1], None, info[2]')
  File "/usr/lib/python2.7/site-packages/otopi/context.py", line 133, in _executeMethod
    method['method']()
  File "/usr/share/ovirt-engine/setup/bin/../plugins/ovirt-engine-setup/ovirt-engine/network/macpools.py", line 98, in _misc_db_entries
    self._create_new_mac_pool_range(range_prefix)
  File "/usr/share/ovirt-engine/setup/bin/../plugins/ovirt-engine-setup/ovirt-engine/network/macpools.py", line 73, in _create_new_mac_pool_range
    to_mac=range_prefix + ':ff:ff',
  File "/usr/share/ovirt-engine/setup/ovirt_engine_setup/engine_common/database.py", line 266, in execute
    args,
IntegrityError: insert or update on table "mac_pool_ranges" violates foreign key constraint "mac_pool_ranges_mac_pool_id_fkey"
DETAIL:  Key (mac_pool_id)=(58ca604b-017d-0374-0220-00000000014e) is not present in table "mac_pools".
CONTEXT:  SQL statement "INSERT INTO mac_pool_ranges (
        mac_pool_id,
        from_mac,
        to_mac
        )
    VALUES (
        v_mac_pool_id,
        v_from_mac,
        v_to_mac
        )"
PL/pgSQL function insertmacpoolrange(uuid,character varying,character varying) line 3 at SQL statement

Thanks, 

Dafna