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', 'f5jgqi1ecaefb8l4esnjhg6cv3', '18.223.213.54', '1746779512', '1746779512', '/product_info.php?products_id=50')

[XT SQL Error]