MySQL error in file: /engine/modules/tagscloud.php at line 40

Error Number: 1021

The Error returned was:
Disk full (/tmp/#sql-temptable-1108b6-d573-11b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")

SQL query:

SELECT tag, COUNT(*) AS count FROM dle_tags GROUP BY tag ORDER BY count DESC LIMIT 0,40