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', '6o05rqq0nv6g94dv48d7r8r1k3', '216.73.216.6', '1751326679', '1751326679', '/product_info.php/info/p5767_Langnachleuchtende-DIN-A5-Platte.html')

[XT SQL Error]