Query failed: SELECT * FROM yeswiki_pages, yeswiki_triples tags WHERE latest = 'Y' and comment_on = '' AND tags.value IN ("mushrooms") AND tags.property="http://outils-reseaux.org/_vocabulary/tag" AND tags.resource=tag GROUP BY tag HAVING COUNT(tag)=1 (Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'yeswiki_cassiopea.yeswiki_pages.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by)