1062 - Duplicate entry '0' for key 'customer_id'

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('0', 'Guest', 'cjldd1oo93k9kuegshefgc69b3', '18.224.73.97', '1715788378', '1715788378', '/store/shopping_cart.php/sort/2a?osCsid=qk3mr7cik3d7tfbn9angkhssv5')

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