Comment 7 for bug 1876345

The data seems to show that:

juju machine 6 is the remaining machine in the model
it is associated with nova compute instance ed21b162-7245-41fa-a0cf-bcc9644e68fe
that instance is not found in openstack, and the last known status was BUILD, so it never got running

juju machine 6 has a volume, volume attachment, and volume attachment plan
the volume and attachment plans are dying, in the process of being removed, but this step is failing because listing attachments for the volume gets a 404 since the instance is not found