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', '1c5c8ccbf205c55b3475ae61d2b1fbbc', '216.73.216.111', '1791667030', '1791667030', '/')

[XT SQL Error]