1366 - Incorrect integer value: '' for column `mapshopatlogis`.`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', '2f2ec89a42a938f46d158e7298f4f7a1', '216.73.216.8', '1758064088', '1758064088', '/index.php?refID=1')

[XT SQL Error]