1366 - Incorrect integer value: '' for column `dogsdream`.`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', 'd9bceca1f60399da621a66ef9f1cf874', '216.73.216.9', '1759386248', '1759386248', '/shop/product_info.php/info/p7_BIO---Apfel---Honig-Leckerli.html')

[XT SQL Error]