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Database error in vBulletin 3.8.4:

Invalid SQL:

INSERT INTO referrers
(url, count)
VALUES
('google.ae%2Furl%3Fsa%3Dt%26source%3Dweb%26cd%3D12%26ved%3D0CDIQFjAL%26url%3Dhttp%253A%252F%252Fwww.zayed4uae.ae%252Fvb%252F%26rct%3Dj%26q%3D%25D8%25B2%25D8%25A7%25D9%258A%25D8%25AF%2520%25D8%25A7%25D9%2584%25D8%25A7%25D9%2585%25D8%25A7%25D8%25B1%25D8%25A7%25D8%25AA%26ei%3DrGxDTMP9GoWmOKiQyO0M%26usg%3DAFQjCNFvMLiM73xX6fRaWVGmtVn7nXfu9A', 1);

MySQL Error   : Duplicate entry 'google.ae%2Furl%3Fsa%3Dt%26source%3Dweb%26cd%3D12%26ved%3D0CDIQF' for key 1
Error Number  : 1062
Request Date  : Monday, July 19th 2010 @ 01:06:24 AM
Error Date    : Monday, July 19th 2010 @ 01:06:24 AM
Script        : http://www.zayed4uae.ae/vb/
Referrer      : http://www.google.ae/url?sa=t&source=web&cd=12&ved=0CDIQFjAL&url=http%3A%2F%2Fwww.zayed4uae.ae%2Fvb%2F&rct=j&q=%D8%B2%D8%A7%D9%8A%D8%AF%20%D8%A7%D9%84%D8%A7%D9%85%D8%A7%D8%B1%D8%A7%D8%AA&ei=rGxDTMP9GoWmOKiQyO0M&usg=AFQjCNFvMLiM73xX6fRaWVGmtVn7nXfu9A
IP Address    : 195.229.242.57
Username      : мɑ©ϲнiɑтѳ
Classname     : vB_Database
MySQL Version :