I created a wiki page, limited the permissions to one group, moved it. Now, when accessing the old URL, I see This document has been moved to /w/…. I click Edit Document and change permissions to All Users. Upon saving changes A moved document can not be deleted. is displayed in red.
What I would actually like to do is clean up the old wiki page in a way such that the URL can be used anew when someone deems it necessary, without seeing the old content (or title) and without being hindered by any permission issues.