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', 'su2vh3rdd7lv4mjh2ocoaq3ol5', '3.147.66.28', '1718733018', '1718733018', '/index.php/cat/images/categories/templates/xtc5/img/images/product_images/thumbnail_images/654_0.JPG')

[XT SQL Error]