1366 - Incorrect integer value: '' for column `ngtkeZ_web1104_2`.`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', 'rjb82iv7agggn6g0lqhaho3hl1', '216.73.216.144', '1765943108', '1765943108', '/popup_content.php?coID=1')

[XT SQL Error]