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', 'i361tc2e94s37mchcj2qm9i534', '3.143.235.90', '1738996104', '1738996104', '/index.php?XTCsid=qg0uqqo4jksa5ns63d51ihq545&cat=c751_Industrie-Akkus.html')

[XT SQL Error]