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', '7f47f3b76772d4e9c6b99d6b1f0d0231', '216.73.216.191', '1758186388', '1758186388', '/index.php/language/de/cat/c42_Vector-Maps.html')

[XT SQL Error]