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', 'h1sh9iuj9b9vc68tnt7vgpsnh1', '54.145.83.79', '1539746724', '1539746724', '/catalog/default.php?cPath=49_181&osCsid=mna83sjl2mgpbbpjba6oice863')

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