1366 - Incorrect integer value: '' for column `shop_db3`.`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', '88b5f256562f34db6cddb60624acd5e7', '18.206.76.45', '1711699684', '1711699684', '/product_info.php?info=p41_Schoener-Abend--Polka-.html&XTCsid=556213bd995aa263df7318e539f41bde')

[XT SQL Error]