While investigating T211174: list=contenttranslationtrend sometimes uses invalid query I got the following error:
2023-12-04 11:35:53 dev.translatewiki.net wiki: [529238b0d9fc6b30b4074e6c] /w/api.php?action=query&format=json&list=contenttranslationlangtrend&target=rn Wikimedia\Rdbms\DBQueryError: Error 1055: 'wiki.cx_translations.translation_last_updated_timestamp' isn't in GROUP BY Function: ContentTranslation\Translation::getTrendByStatus Query: SELECT translation_last_updated_timestamp AS `date`,COUNT(translation_id) AS `count` FROM `cx_translations` WHERE (translation_status = 'published' OR (translation_target_url IS NOT NULL)) AND translation_target_language = 'rn' GROUP BY YEARWEEK(translation_last_updated_timestamp, 3)