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', 'tivvr78bfk4tsas9u0u4r7t8e6', '54.80.208.105', '1534357192', '1534357192', '/catalog/product_info.php?products_id=636&osCsid=lu94nqe7a1geohpd2khjekp2s4')

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