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', 'jhb9uetr6lh3c4m694fsmtr9t4', '54.161.100.24', '1540008889', '1540008889', '/catalog/product_info.php?name=KAY%20Graduation%20Stole%2098420%20red%20letters&products_id=837')

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