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', 't4e5rboufkp9r5tjbj901k2hu2', '18.219.185.67', '1718730864', '1718730864', '/index.php/cat/admin/images/icons/templates/xtc5/img/images/product_images/thumbnail_images')

[XT SQL Error]