MySQL error in file: /engine/engine.php at line 1145

Error Number: 1021

The Error returned was:
Disk full (/tmp/#sql-temptable-3ae-424ac-c0d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")

SQL query:

SELECT p.id, t.tag FROM dle_post p INNER JOIN dle_tags t on (t.news_id=p.id) WHERE t.tag = 'web' AND p.approve=1 ORDER BY date DESC LIMIT 0,20