Database_Exception [ 1055 ]: [1055] Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'web_nd.it_translations.id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by ( SELECT `it_translations`.* FROM `it_translations` AS `it_translations` WHERE `lang_id` = '1' AND `table` = 'menu' GROUP BY `reference_id` ) ~ MODPATH/database/classes/kohana/database/mysqli.php [ 182 ]