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', 'i3g4ee428gunbvmn6j1vqj75b7', '3.141.193.158', '1714002800', '1714002800', '/login.php?XTCsid=i3g4ee428gunbvmn6j1vqj75b7')

[XT SQL Error]