Migrating from 1.2.0-rolling+201906210337 to 1.2-rolling-201908240337 fails:
Aug 24 20:48:04 debian vyos-router[867]: Starting VyOS router: migrateTraceback (most recent call last):
Aug 24 20:48:04 debian vyos-router[867]: File "/opt/vyatta/etc/config-migrate/migrate/interfaces/0-to-1", line 41, in <module>
Aug 24 20:48:04 debian vyos-router[867]: igmp_val = config.return_value(base + [br, 'igmp-snooping', 'querier'])
Aug 24 20:48:04 debian vyos-router[867]: File "/usr/lib/python3/dist-packages/vyos/configtree.py", line 275, in return_value
Aug 24 20:48:04 debian vyos-router[867]: raise ConfigTreeError("Path [{}] doesn't exist".format(path_str))
Aug 24 20:48:04 debian vyos-router[867]: vyos.configtree.ConfigTreeError: Path [b'interfaces bridge br0 igmp-snooping querier'] doesn't exist
Aug 24 20:48:04 debian vyos-router[867]: Called process error: Command '['/opt/vyatta/etc/config-migrate/migrate/interfaces/0-to-1', '/opt/vyatta/etc/config/config.boot']' returned non-zero exit status 1.