Database Error

I'm receiving the following error whenever I try to buy a lottery ticket

Database error in vBulletin 3.5.4:

Invalid SQL:

		INSERT INTO vb351_vbplaza_itemhistory (historyid, itemid, itemname, userid, username, dateline, finalcost, extrainfo)
		VALUES
		(
			0,
			'48',
			'Buy Lottery Ticket',
			'533',
			'Rafael',
			'1164154997',
			'87.84252',
			'Lottery Name: Weekly Lottery - Number of Tickets: 1'
		);

MySQL Error  : Duplicate entry '1' for key 1
Error Number : 1062
Date         : Tuesday, November 21st 2006 @ 05:23:18 PM
Script       : http://www.whatchamissin.com/forums/vbplaza.php
Referrer     : http://www.whatchamissin.com/forums/vbplaza.php
IP Address   : xxxxx
Username     : Rafael
Classname    : vb_database

how can I correct this?

Thanks!

[WhatChaMissin]

anyone???