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', 'onjk3v1r2ecfe32v6afguadf16', '52.14.236.72', '1718727225', '1718727225', '/index.php/cat/images/product_images/thumbnail_images/templates/xtc5/img/templates/xtc5/stylesheet.css')

[XT SQL Error]