1366 - Incorrect integer value: '' for column `hbl_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', 'bnb18r2rcl3m1s8t23f7kfscf6', '18.97.9.170', '1742526466', '1742526466', '/index.php?cat=c6_Fuer-Haus-und-Garten.html')

[XT SQL Error]