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', '2en8omc0oqcql8v9d5i7dk3n37', '3.237.32.143', '1711711803', '1711711803', '/login.php?XTCsid=2en8omc0oqcql8v9d5i7dk3n37')

[XT SQL Error]