1366 - Incorrect integer value: '' for column `pella-ware`.`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', '2f0c78f8d3b9d5b8a818ea2b1c1bbf4c', '18.221.52.77', '1732166574', '1732166574', '/')

[XT SQL Error]