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', 'c6subf49j3abe53pjin8anvru6', '3.145.158.106', '1715788501', '1715788501', '/store/contact_us.php?osCsid=e73qnhtohfbb8nqe7rf24qmfr0')

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