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', 'uctrfbv4fmonb4h0lh5teuj7t1', '18.189.13.48', '1746948055', '1746948055', '/product_info.php?info=p628_800345-Schlammsieb-fuer-Elektro-Futterdaempfer-100-Liter.html')

[XT SQL Error]