MySQL error in file: /engine/mod_punpun/related_link/related_link.php at line 70

Error Number: 1

The Error returned was:
Can't create/write to file '/tmp/#sql_402_0.MYI' (Errcode: 28)

SQL query:

SELECT * FROM ((SELECT * FROM dle_post LEFT JOIN dle_post_extras ON (dle_post.id=dle_post_extras.news_id) WHERE approve='1' AND (category LIKE '16,%' OR category = '16') AND id<'5456' ORDER BY id DESC LIMIT 2) UNION (SELECT * FROM dle_post LEFT JOIN dle_post_extras ON (dle_post.id=dle_post_extras.news_id) WHERE approve='1' AND (category LIKE '16,%' OR category = '16') AND id>'5456' ORDER BY id ASC LIMIT 3)) as r ORDER BY r.id ASC