I have follow exactly the Openstack install guide on the Docs

So far so good

I only occur a problems when populate the Neutron database:

After su -s /bin/sh -c "neutron-db-manage --config-file /etc/neutron/neutron.conf \ --config-file /etc/neutron/plugins/ml2/ml2_conf.ini upgrade head" neutron

I run for a while then this problem happended: oslo_db.exception.DBError: (pymysql.err.InternalError) (1832, "Cannot change column 'network_id': used in a foreign key constraint 'subnets_ibfk_1'") [SQL: 'ALTER TABLE subnets MODIFY network_id VARCHAR(36) NOT NULL'] (Background on this error at: http://sqlalche.me/e/2j85)

I have search on google but too few result found and didn't have anything at all