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', 'mr80105sfje1mk150h6cvl66t6', '3.15.4.244', '1713553308', '1713553308', '/login.php?XTCsid=mr80105sfje1mk150h6cvl66t6')

[XT SQL Error]