MediaWiki:Filerevert-intro

You are about to revert the file [[Media:$1|$1]] to the [$4 version as of $3, $2].

Note: The current settings of the internal image cache prevents new image versions from being displayed immediately. Do not try to revert the file again, as it will have no effect. Check the reported filesize and dimensions of the current file to see if it is the same as the image you tried reverting to. If it is, then your revert succeeded and you need to wait for the server to catch up. If the new image does not show up after one hour and after and clearing your local cache (CTRL+F5), please try to revert again.