1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'r6k3keudkb3d8s1d5a6kc1e675', '54.161.100.24', '1539822344', '1539822344', '/catalog/product_info.php?products_id=435&osCsid=bc2lia5lgr3jh1snuvbtees5l3')

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