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', '9d9a400d30115b7dc0c8b5b8f8293734', '216.73.216.20', '1771939829', '1771939829', '/shop_content.php/language/de/coID/2/content/Privatsphaere-und-Datenschutz')

[XT SQL Error]