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', '15247161cf5219fd4c745c7fedad58e5', '216.73.217.140', '1781039058', '1781039058', '/create_account.php')

[XT SQL Error]