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', '2p97o5k0cuvu6dfknjpk5ak5v4', '3.136.160.250', '1738999046', '1738999046', '/index.php?XTCsid=b08vstu7leg8ef8i43caoskln6&cat=c1188_Lautsprecher-Akku.html')

[XT SQL Error]