1366 - Incorrect integer value: '' for column `argus_xtc`.`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', 'iu7tib8293gknj4v2d62i440c3', '3.85.143.239', '1558356706', '1558356706', '/shop/product_info.php?info=p17_Netzteil-12V--stabilisiert---1-5A-fuer-Ueberwachungskameras.html')

[XT SQL Error]