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', '3b9salbt87denm0ae7nutr4j62', '216.73.216.60', '1762790600', '1762790600', '/product_info.php/info/p6893_-Jockel-P-12J-Universal----Auflade-Pulverloescher.html')

[XT SQL Error]