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', 'mjvv11ufh66n54gnh8btj545e7', '52.14.121.242', '1714007560', '1714007560', '/login.php?XTCsid=mjvv11ufh66n54gnh8btj545e7')

[XT SQL Error]