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', '31238b2997ddfce75dc92f34057d2b6a', '216.73.216.201', '1752842252', '1752842252', '/index.php/language/en/cat/templates/css_dark_green/img/pixel_trans.gif')

[XT SQL Error]