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) values ('0', 'Spider: 50.17.27.205', 'ccbot/2.0 (http://commoncrawl.org/faq/)', '50.17.27.205', '1406115587', '1406115587', '/Jungs/Muetzen-Schals-Handschuhe---2_97.html', 'test', ' -- ')

[XT SQL Error]