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', 'a9oamb70nkv7eop2hpu17aua07', '3.22.250.11', '1718734390', '1718734390', '/index.php/cat/templates/xtc5/images/product_images/thumbnail_images')

[XT SQL Error]