1366 - Incorrect integer value: '' for column `abtecsho_shop`.`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', 'rc7dbvubku8lmdpjp0p03tsiq3', '3.148.162.188', '1746781768', '1746781768', '/shop_content.php/coID/102/product/Materialerkl--rung--Qualit--tsversprechen-')

[XT SQL Error]