I scrolled to the bottom of my unread notifications and tried to view the next page
https://phabricator.wikimedia.org/notification/query/unread/?after=6947980132541565617
Unhandled Exception ("Exception") Rows passed to "loadAllFromArray(...)" include two or more rows with the same ID ("4497549"). Rows must have unique IDs. An underlying query may be missing a GROUP BY.