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', '48a1784a929b9e3081978ba20cd4ad16', '216.73.216.3', '1766066252', '1766066252', '/index.php/language/de/cat/c42_Vektorkarten.html')

[XT SQL Error]