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', '539396bee251ecf973237748707af67c', '3.144.189.177', '1713476581', '1713476581', '/product_info.php?info=p228_Auf-Wiedersehn.html&XTCsid=c00a13a977272d3659dd7fe5a5f758e9')

[XT SQL Error]