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', 'bcaf86s5mtb6hv2cdvb2jp0fg4', '18.118.163.233', '1739000020', '1739000020', '/index.php?XTCsid=mkl8qqqorbnshicuaf45rnrdo2&cat=c475_Spielekonsolen-Akku.html')

[XT SQL Error]