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: 18.232.188.251', 'ccbot/2.0 (https://commoncrawl.org/faq/)', '18.232.188.251', '1586094418', '1586094418', '/index.php/language/jp/cat/c249_sold-specimens.html/page/10', 'test', ' -- ')

[XT SQL Error]