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', '672t380tugf0sst9p5cu9al313', '54.162.171.242', '1534366614', '1534366614', '/catalog/shopping_cart.php?osCsid=ml78qido8223rl91gb78jm51a3')

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