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', 'vckplv1gol3fcf8fdkul59h074', '216.73.216.3', '1762291263', '1762291263', '/product_info.php/info/p638_ISO-7010-W-001--Gefahrenstelle--allgemein.html')

[XT SQL Error]