Warning:  [mysql error 1054] Unknown column 'com.email' in 'field list'

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 photo_image_category AS ic
    INNER JOIN photo_comments AS com
    ON ic.image_id = com.image_id
    LEFT JOIN photo_users As u
    ON u.id = com.author_id
  WHERE 1=1
    AND validated='true'
    AND  (category_id NOT IN (44,45,46,295,63,67,70,75,76,77,79,94,96,106,116,117,118,121,133,134,143,144,145,147,151,167,168,169,170,317,308,316,240,239,237,284,309,310,176,278,238,298,312,311,207,193,202,277,276,253,252))
  GROUP BY comment_id
  ORDER BY date DESC
  LIMIT 10 OFFSET 0
; in /home/congressfi/ot-dunkerque/photo/include/dblayer/functions_mysqli.inc.php on line 847