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', '9b6e7f7cfa263f8ee9e82614e03f5fc9', '216.73.216.3', '1767297240', '1767297240', '/product_info.php?info=p3445_Guyana-Reliefkarte.html')

[XT SQL Error]