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', 'lljdtj8cpa5963h6erb3sttgf2', '52.54.103.76', '1711644205', '1711644205', '/login.php?XTCsid=lljdtj8cpa5963h6erb3sttgf2')

[XT SQL Error]