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', '08a5e974ddd69ebeb36115aeec35520d', '18.223.107.149', '1713607821', '1713607821', '/product_info.php?info=p245_Drunt-am-Bergsee.html&XTCsid=8c4102f41ddb20799250c1276e1c9d62')

[XT SQL Error]