Duplicate entry error in db????

can someone help me with this?  I got like 300 emails regarding this issue.

REPLACE INTO `sys_sessions` SET `id`='j24a&R!xr9U96WxpRWHag+ghLa5Ee,WE', `user_id`='0', `data`='a:0:{}', `date`=UNIX_TIMESTAMP()

Mysql error: Duplicate entry '0' for key 'user_id'

Found error in the file '/home/outtarea/public_html/mydomain.com/inc/classes/BxDolSessionQuery.php' at line 38.
Called 'query' function with erroneous argument #0.

 Just empty that table and the error would go away....

REPLACE INTO `sys_sessions` SET `id`='j24a&R!xr9U96WxpRWHag+ghLa5Ee,WE', `user_id`='0', `data`='a:0:{}', `date`=UNIX_TIMESTAMP()

the sys_session error table?  do I need whats in there? I think it was when my server went down for about an hour, if it happens again I will do this

Its temp session data. It's ok to clear it.

Run this using phpMyAdmin

TRUNCATE TABLE `sys_sessions`

thanks but will this happen again after I do this?