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', 'bh2t2c49fc0bjgbhbr8asnfsc6', '3.15.156.140', '1713584056', '1713584056', '/login.php?XTCsid=bh2t2c49fc0bjgbhbr8asnfsc6')

[XT SQL Error]