1366 - Incorrect integer value: '' for column `creatihu_shop`.`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', '74f40f7efbcee99ae2147007c93dc1cc', '18.97.14.89', '1771185395', '1771185395', '/')

[XT SQL Error]