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', 'kp7km4ouvg461sjrr2tgl6a6t6', '54.81.150.27', '1537442777', '1537442777', '/catalog/default.php?cPath=49_177&osCsid=alc6etv3ckpcp7ahc5mh6h78m6')

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