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', 'hmck0evbsbmp9eunv9uff2h8k0', '44.223.31.148', '1711668791', '1711668791', '/login.php?XTCsid=hmck0evbsbmp9eunv9uff2h8k0')

[XT SQL Error]