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', '3jdvn17k7t8pe90h49bha0vn85', '3.19.79.79', '1715788301', '1715788301', '/store/product_info.php/products_id/37?osCsid=eldkf2e3ugh9snd73ufiofsr71')

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