Database Error Need help..

[Khalid-B]

Hello.
I am getting data base error when some one come from other sites .
when some one search my Forum from Google and try to acess than some times get error and some times not , here is error messege that i am receving in my Email box.

Database error in vBulletin 3.6.8:

Invalid SQL:

INSERT INTO referrers
(url, count, title)
VALUES
('google.co.uk%2Fsearch%3Fq%3Dvioh.com%26hl%3Den%2 6start%3D10%26sa%3DN', 1, 'vioh.com+-+Google+Search');

MySQL Error : Duplicate entry 'google.co.uk%2Fsearch%3Fq%3Dvioh.com%26hl%3Den%26 start%3D10%26sa%3DN' for key 1
Error Number : 1062
Date : Friday, August 17th 2007 @ 01:55:56 PM
Script : http://www.mysite.com/Forums/showthread.php?p=4421
Referrer : http://www.google.co.uk/search?q=vio...&start=10&sa=N
IP Address :xxxxxxx
Username : Unregistered
Classname : vb_database

Please help .
Thanks in advance.