Warning:  [mysql error 3065] Expression #1 of ORDER BY clause is not in SELECT list, references column 'piwigo.piwigo_image_category.rank' which is not in SELECT list; this is incompatible with DISTINCT

SELECT DISTINCT(image_id)
  FROM piwigo_image_category
    INNER JOIN piwigo_images ON id = image_id
  WHERE
    category_id = 16
AND (category_id NOT IN (1))
   ORDER BY rank ASC
; in /home/nicolasbcom/public_html/photos/include/dblayer/functions_mysqli.inc.php on line 830