MySQL error in file: /engine/photo/photo_nucleus/classes/informers.php at line 50

Error Number: 1021

The Error returned was:
Disk full (/mysql/temp/#sql_c_0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")

SQL query:

SELECT name, value FROM dle_photo_sets WHERE (`default` = 1 AND `name` = 'configuration') OR `name` = 'todir' GROUP BY name, `default` LIMIT 2