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', 'kr973j5ref5skv868l1ukvubb5', '18.119.28.237', '1715788404', '1715788404', '/store/product_info.php/cPath/23/products_id/115?osCsid=g54ovnhtnflumagerl6m6si6q4')

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