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', 'a377b5a9ebf2dbecb44dd8ce588ddcf2', '216.73.216.8', '1758016052', '1758016052', '/product_info.php/language/de/info/p3139_Afghanistan-Relief-Map.html')

[XT SQL Error]