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', 'c862b08f5a54086b3f055b187412ebb9', '216.73.216.9', '1759386247', '1759386247', '/shop/product_info.php/info/p3_BIO---Ingwerplaetzchen-mit-Algen.html')

[XT SQL Error]