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', '5n092ert5egv0ttg956hihfme0', '3.143.214.56', '1715788329', '1715788329', '/store/shopping_cart.php/sort/2a?osCsid=vbagdp1sg289qf23otrd119f27')

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