1366 - Incorrect integer value: '' for column `CP_as15`.`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', 'gse4b66ci06ofsvarfl848d6l3', '18.219.7.43', '1738997531', '1738997531', '/index.php?XTCsid=nmu1l7bj1113ksvu525rsptc72&cat=c825_Modellbau-Akkus.html')

[XT SQL Error]