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', '34aa5db0884fe246f8cf31612a1e35cb', '34.230.84.106', '1710818704', '1710818704', '/login.php?language=de')

[XT SQL Error]