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', 'qk0v20qt49oto9ruls2o5okei5', '54.224.118.247', '1540082688', '1540082688', '/catalog/default.php?cPath=47_112&osCsid=9rrm7krdqon5m34tmh1sd927t6')

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