[xwiki-users] User renamed space - now inaccessible

Hi everybody, I have a huge issue here with our XWiki 7.4.4 instance running on CentOS 7 / Tomcat 8.0.33. We had a document space "Customer Docs" in a sub wiki "Customers" with several nested docs (customers with more nested docs). A user managed to break the whole document space by renaming it to "@Spain Wiki". When accessing the page now the browser throws a "This page does not work, <SERVERNAME> has redirected too often" (translated from German). I see the pages with the old names in Page Index under deleted documents but when I click the actions icon (which says it can't be restored because it already has been recreated?!) I get the same browser error. Is there any way I can restore the old document space? (Restoring a database backup will not work because too many other things have been changed in other parts of the wiki, the renaming was done on April 20th but discovered today) Regs, Dennis