Warning: [mysql error 3] Error writing file '/tmp/MYon6Tb9' (Errcode: 28)

SELECT id
  FROM piwigo_images i 
    INNER JOIN piwigo_image_category ic ON id=ic.image_id
    INNER JOIN piwigo_image_tag it ON id=it.image_id
    WHERE tag_id IN (116)
  AND (category_id NOT IN (682,965,603,1133,776,732,924,276,1187,749,750,1164,677,787,1135,1136,798))
  GROUP BY id
ORDER BY name ASC, file ASC in /srv/http/andrew/www/photo/include/dblayer/functions_mysqli.inc.php on line 832