Steps to reproduce:
- Go to https://de.wikipedia.org/wiki/Wikipedia:Hauptseite
- Type "versionsge" in the search field, wait for suggestions to appear (or just visit https://de.wikipedia.org/w/api.php?action=opensearch&search=versionsge)
-> The last entry is "Versionsgeschichte von MediaWiki", though https://de.wikipedia.org/wiki/Versionsgeschichte_von_MediaWiki has been deleted almost a year ago.
I'm not sure where this old entry comes from, but by now it should have been removed from the search index.