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', '1cncq793ef4n73vc8ote6fhtp3', '3.144.178.2', '1746945379', '1746945379', '/product_info.php?info=p632_800307-Deckel-fuer-Elektro-Futterdaempfer-63-Liter.html')

[XT SQL Error]