Hi, everyone. I install a devstack from the latest code. But there is an error when I create a db migration script. My migration shell is: "neutron-db-manage --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/ml2_conf.ini revision -m "Just For Test"" The error shows: Running revision for neutron ... FAILED: Multiple heads are present; please specify the head revision on which the new revision should be based, or perform a merge. Does my method wrong? Could someone helps me? Thx Zhi Chang -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack-dev/attachments/20151012/b4c9ec0d/attachment.html>