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', 'tq23bl31t6ibm7csqq6kcac9o6', '18.97.9.170', '1739817336', '1739817336', '/shop_content.php/coID/23/product/Hinweise-und-Erkl--rungen')

[XT SQL Error]