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', 'bt6ffo98mo2ia6hmhkvhfapl27', '54.211.203.45', '1711643019', '1711643019', '/login.php?XTCsid=bt6ffo98mo2ia6hmhkvhfapl27')

[XT SQL Error]