1366 - Incorrect integer value: '' for column `hbl_shop`.`whos_online`.`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', '4j4i08gsf1r85sf35fja669gr0', '216.73.216.47', '1757988240', '1757988240', '/product_info.php?products_id=580')

[XT SQL Error]