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', '1pmuauaevt33fue9lvc5l92kh6', '3.135.190.101', '1714128945', '1714128945', '/login.php?XTCsid=1pmuauaevt33fue9lvc5l92kh6')

[XT SQL Error]