1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '01a308956c9b399d4ee77965e55e8ef1', '216.73.216.9', '1759439261', '1759439261', '/product_info.php?info=p2652_Spanien-Reliefkarte.html')

[XT SQL Error]