1366 - Incorrect integer value: '' for column `usr_web74_1`.`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', 'l21md3rb2it8tdrs9q88hc6173', '18.191.181.143', '1722064816', '1722064816', '/shop_content.php?coID=4')

[XT SQL Error]