1062 - Duplicate entry '16777215' for key 'PRIMARY'

insert into user_tracking (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url, page_desc, referer_url,refferers_id,browser) values ('0', 'Spider: 54.237.235.12', 'ccbot/2.0 (http://commoncrawl.org/faq/)', '54.237.235.12', '1419218546', '1419218546', '/modellbahn-onlineshop/de/Modellbahn/Spur-H0/Loks/DC/Dampfloks/H0-Museumslok-BR-19-017-Sachsenstolz-Gleichstromausfuehrung-_GUeTZ048100.html', '', ' -- ', '', 'CCBot/2.0 (http://commoncrawl.org/faq/)')

[XT SQL Error]