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', '5570k23ahiho85l1im04ik6um1', '54.224.56.126', '1540285594', '1540285594', '/catalog/default.php?cPath=56&osCsid=alc6etv3ckpcp7ahc5mh6h78m6')

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