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', '9b52686e9e5a5b6facece6c64db31343', '216.73.216.191', '1758184350', '1758184350', '/index.php/language/de/cat/c35_Laender.html/page/3')

[XT SQL Error]