1366 - Incorrect integer value: '' for column `db110607`.`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', 'adqn3fq08409vm6k9pc1591jd5', '3.238.104.143', '1657034994', '1657034994', '/advanced_search_result.php?keywords=Himmelbett')

[XT SQL Error]