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', 'mh753gfqqotle2tvlnev2atvr6', '54.234.136.147', '1711618848', '1711618848', '/login.php?XTCsid=mh753gfqqotle2tvlnev2atvr6')

[XT SQL Error]