http://domain.com/catalog/default.php?ref=278
when a user goes to this address,by clicking on an ad they get this error:
1062 - Duplicate entry '1026811' for key 1
insert into affiliate_clickthroughs (affiliate_id, affiliate_clientdate, affiliate_clientbrowser, affiliate_clientip, affiliate_clientreferer, affiliate_products_id, affiliate_banner_id) values ('278', '2005-08-18 09:53:00', 'Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en) AppleWebKit/412.6 (KHTML, like Gecko) Safari/412.2', '67.93.248.210', '', '', '')
anyone knows what is causing it.