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', '783ee4478b7a70d206cdf350b2d5d8c5', '216.73.216.191', '1758203340', '1758203340', '/index.php/cat/c35_Laender.html/page/5')

[XT SQL Error]