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', 'bom7oregqilulq47nc88eco557', '216.73.216.109', '1752544725', '1752544725', '/product_info.php/info/p6316_KNS-Rettungszeichen--Richtungsangabe-aufwaerts---abwaerts-nach-BGV.html')

[XT SQL Error]