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', 's8kvjje39bghs157s9k8c374t0', '54.80.102.170', '1534597181', '1534597181', '/catalog/product_info.php?products_id=788&osCsid=ml78qido8223rl91gb78jm51a3')

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