does anyone know how this can be reverted?
It's done.
quick-wiki-page-revert-howto:
* Go to the page you want to revert.
* Click "History"
* Find the version you want to revert to. (Click on it's date)
* You should now see the correct version.
* Edit that page. You will se a Warning at the top of the edit page. It's ok.
* Save the page.