1366 - Incorrect integer value: '' for column `magickland`.`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', 'sbnahkfmatln15aohl6bser462', '3.144.17.126', '1718727953', '1718727953', '/index.php/manu/m3_RS-Namibia.html/manufacturers_id/templates/xtc5/img/templates/xtc5/img/images/product_images/thumbnail_images')

[XT SQL Error]