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', '99sv8sqobrgalp40bqcbh03g57', '216.73.216.71', '1752609124', '1752609124', '/product_info.php/info/p6973_BGV-A8-E-09--Rettungsweg-links.html')

[XT SQL Error]