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', '15q27p7okjsurdl08evsfhei72', '18.220.98.190', '1738994682', '1738994682', '/index.php?XTCsid=rl82acg8c5l20cikdfeu2s7rt7&cat=c35_Ladeger--t-f--r-Kameras-mit-Akku.html')

[XT SQL Error]