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', 'fiun364ieltaaafv92iaa9i2g3', '3.144.185.82', '1748234400', '1748234400', '/product_info.php?info=p641_800031-Schlammsieb-fuer--63-Liter-Futterdaempfer.html')

[XT SQL Error]