Undeletion will not be performed if it will result in the top page or file revision being partially deleted. In such cases, you must uncheck or unhide the newest deleted revision.
MediaWiki:Undeleterevdel
From Unofficial Fantasica Wiki
Undeletion will not be performed if it will result in the top page or file revision being partially deleted. In such cases, you must uncheck or unhide the newest deleted revision.
