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', 'dbf0nip9itv94dm0bm3dvtp8h7', '18.223.168.194', '1746768571', '1746768571', '/index.php?cat=c6_Fuer-Haus-und-Garten.html')

[XT SQL Error]