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', 'd0259965c2e702d5e784ffcccf8ec640', '216.73.216.198', '1752879623', '1752879623', '/shop_content.php/language/de/coID/23/content/Bestellablauf')

[XT SQL Error]