Warning: [mysql error 1055] Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'nocnicz_obr.ic.category_id' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by SELECT SQL_CALC_FOUND_ROWS com.id AS comment_id, com.image_id, ic.category_id, com.author, com.author_id, u.mail_address AS user_email, com.email, com.date, com.website_url, com.content, com.validated FROM piwigo_image_category AS ic INNER JOIN piwigo_comments AS com ON ic.image_id = com.image_id LEFT JOIN piwigo_users As u ON u.id = com.author_id WHERE 1=1 AND validated='true' AND (category_id NOT IN (4)) GROUP BY comment_id ORDER BY date DESC LIMIT 10 OFFSET 0 ; in /home/nocnicz/public_html/piwigo/include/dblayer/functions_mysqli.inc.php on line 830

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