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', '7g7t7ngjner56f92qo9hv14gt2', '18.226.163.8', '1746777935', '1746777935', '/product_info.php?products_id=40')

[XT SQL Error]