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', '3f6343c3056ff71a554dd75a114a860a', '23.20.220.59', '1710826121', '1710826121', '/shop_content.php/coID/4/content/Impressum')

[XT SQL Error]