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', '2c9645728e5170df60824b5bfee7ec3b', '216.73.216.142', '1775667673', '1775667673', '/')

[XT SQL Error]