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', 'r2itnh0bvnkgk6sv99h0u6mlf6', '18.188.99.178', '1718728279', '1718728279', '/index.php/cat/templates/xtc5/images/russian/templates/product_images/thumbnail_images')

[XT SQL Error]