1366 - Incorrect integer value: '' for column `abtecsho_shop`.`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', 'o0nq41f1kecouhmfe1okp1l0e0', '216.73.216.45', '1758172367', '1758172367', '/index.php/XTCsid/o0nq41f1kecouhmfe1okp1l0e0')

[XT SQL Error]