MySQL error in file: /engine/modules/blockpro/block.pro.3.php at line 394

Error Number: 1021

The Error returned was:
Disk full (/dev/shm/#sql_6c7_27); waiting for someone to free some space...

SQL query:

SELECT p.id, p.autor, p.date, p.short_story, p.full_story, p.xfields, p.title, p.category, p.alt_name, p.allow_comm, p.comm_num, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes from dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) where approve AND date < "2018-06-25 01:40:46" order by RAND() DESC limit 0,5