I unsuccessfully tried to edit https://www.wikidata.org/wiki/Q2718734. The result was: [WixEfApAIC8AAIGm95gAAAAK] 2017-12-09 20:16:12: Errore irreversibile di tipo "Wikimedia\Rdbms\DBQueryError"
According to @Legoktm "Lock wait timeout exceeded; try restarting transaction". mw1279 seems to have some issues.
Could just edit the item without problems. Seems to be resolved by now.
Thanks for testing!