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', '0ccb57e100f47a8fd5f26e487539533d', '216.73.216.3', '1767300908', '1767300908', '/product_info.php?info=p3251_Guinea-Bissau-Reliefkarte.html')

[XT SQL Error]