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', 'fudbd89qie553usc1l9e6dmsk1', '54.162.171.242', '1534366694', '1534366694', '/catalog/shipping.php?osCsid=ogmavqutg3lt8h8c4nlejpu9c6')

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