An account was renamed on the Dutch Wikipedia (Wikix -> Wikix-oud; Wwikix -> Wikix) due to the original user not being able to login anymore. He forgot his password after he changed it a few times. Wikix has 180,000+ edits, see the rename logs: https://nl.wikipedia.org/w/index.php?title=Speciaal%3ALogboeken&type=renameuser&user=CaAl&page=&year=&month=-1&tagfilter=
The bureaucrat got an error when renaming this account: "database lock time out, please try again". Wikix said he can't login as Wikix so there definitely went something wrong. See also https://nl.wikipedia.org/wiki/Wikipedia:Verzoek_voor_hernoeming_van_account#Wwikix_.E2.86.92_Wikix
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Severity: major