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', '81fabbc5efd175118b4d5c9325070f5c', '3.137.218.215', '1713518694', '1713518694', '/product_info.php?info=p41_Schoener-Abend--Polka-.html&XTCsid=a451af72c17a970910eac808a75b0ae1')

[XT SQL Error]