1366 - Incorrect integer value: '' for column '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', '5cb19c7a588da342ec44a4ee9ea4ba50', '18.116.118.198', '1713615226', '1713615226', '/shop_content.php/coID/2/content/Datenschutz')

[XT SQL Error]