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', 'jf3i32upkb7035rp852bkhfpf5', '216.73.216.15', '1765869666', '1765869666', '/shop_content.php/coID/13/content/Widerrufsrecht')

[XT SQL Error]