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', 'okafja2b5k46vuuu4cqom8kbb2', '3.145.186.173', '1713412172', '1713412172', '/login.php?XTCsid=okafja2b5k46vuuu4cqom8kbb2')

[XT SQL Error]