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', 'cq3f38b45vbqb5gcjadq6l5l17', '216.73.216.94', '1751764442', '1751764442', '/popup_content.php?coID=1')

[XT SQL Error]