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', '3vl2r6tdo3uqft7d8pidrqpc33', '54.224.247.42', '1540250567', '1540250567', '/catalog/product_notifications.php?osCsid=qbn1tehcn2mbo2rg49jaj6ama3')

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