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: 54.80.198.134', 'ccbot/2.0 (http://commoncrawl.org/faq/)', '54.80.198.134', '1419126521', '1419126521', '/modellbahn-onlineshop/de/Neuheiten/Roco/2011-Messe/Roco-15010-Bausatz-Bhf-Mariazell_ROCO015010.html', '', ' -- ', '', 'CCBot/2.0 (http://commoncrawl.org/faq/)')

[XT SQL Error]