Mail/ SQL server error

[محروم.كوم]

This is the error returned by one board today. Any clues?

Database error in vBulletin 3.8.2:

Invalid SQL:

UPDATE datastore SET
data = data - 2*
data = IF(data < 0* 0* data)
WHERE title = 'mailqueue';


MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Sunday* October 4th 2009 @ 05:52:12 PM
Error Date : Sunday* October 4th 2009 @ 05:52:27 PM __DEFINE_LIKE_SHARE__