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', 'lfhq9ken59l5nahj8bgk52q967', '18.222.184.135', '1718731166', '1718731166', '/index.php/cat/admin/images/icons/templates/xtc5')

[XT SQL Error]