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', '8557739359a01c1d07a49a3c91c27aac', '216.73.216.44', '1768657643', '1768657643', '/index.php/cat/c7_3D-Landschafts-Modelle.html')

[XT SQL Error]