Mail/ SQL server error

[BoredOutOfMyMind]

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

[RS_Jelle]

This is a common MySQL configuration problem. Have a look at this thread