Can some PLEASE explain to me what "compare versions" is good for?
so, what exactly am I supposed to do when I see this message? and what is it telling me (I mean I only have ONE version, so where is it find the 'problem')
Fortunately Hissy put together an installable job that will fix this:
Running this job clears these erroneous messages.
In the versions menu you just create a New page from the approved page (with new slug) and save it to a different location in the Sitemap.
This page does not have the error, so you can simply delete the old page then rename your slug back