I have been testing a migration scenario from Server to Cloud. My goal is to test the migration, document it, and perform the same again as a go live migration. When I migrate content I bring in some personal spaces. On the cloud side, in order to migrate again, I need to clear the content. I would prefer to not have to delete/reset Cloud and add it back, so I tried deleting all the spaces. When I try to perform the migration again I'm told some spaces exist on the cloud site. These turn out to be personal spaces that do not appear in the Security/Space Permissions page. Why is that, and how can I fix this?