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', '4j128g3idq329ckcv057rbf7o0', '18.217.80.37', '1738994609', '1738994609', '/index.php?XTCsid=rl82acg8c5l20cikdfeu2s7rt7&cat=c1174_Ladeger--te-f--r-Li-Ion-Akkus.html')

[XT SQL Error]