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', 'ncvn0rm3jt0s5e29886p97aon7', '3.145.100.218', '1738997990', '1738997990', '/index.php?XTCsid=mkl8qqqorbnshicuaf45rnrdo2&cat=c1239_Smartwatch-Akku.html')

[XT SQL Error]