maybe your evacuation status is not in ['accepted', 'pre-migrating', 'done'], see the bug https://bugs.launchpad.net/nova/+bug/1947812 report by me.
maybe your evacuation status is not in ['accepted', 'pre-migrating', 'done'], see the bug https:/ /bugs.launchpad .net/nova/ +bug/1947812 report by me.