1366 - Incorrect integer value: '' for column `hbl_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', '54lkcj3bhgchkgvuc3ind5f3h6', '18.97.9.170', '1742531719', '1742531719', '/product_info.php?info=p598_804749-Saeschar-fuer-Einradhacke--3-St--.html')

[XT SQL Error]