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', '0r6a6118c7ih4vl5b1e2uvg690', '3.147.69.91', '1738995761', '1738995761', '/index.php?XTCsid=qg0uqqo4jksa5ns63d51ihq545&cat=c722_Funk-Kopfh--rer-Akku.html')

[XT SQL Error]