1366 - Incorrect integer value: '' for column `creatihu_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', 'c936ad4d57477abd67df43ff3a2ca02f', '3.16.15.149', '1714173688', '1714173688', '/shop_content.php?coID=3')

[XT SQL Error]