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', 'a3dfmb7hmhm29s8h9c44g7rgk0', '18.222.67.251', '1713263391', '1713263391', '/login.php?XTCsid=a3dfmb7hmhm29s8h9c44g7rgk0')

[XT SQL Error]