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', 'f5frq77h2m5nnph24d24h40gd1', '18.119.108.33', '1718707801', '1718707801', '/index.php/cat/admin/images/icons/templates/xtc5/img/images/product_images/thumbnail_images')

[XT SQL Error]