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', 'i1r0fq64i3j3a4pibu4l5bd027', '18.191.246.21', '1738997936', '1738997936', '/index.php?XTCsid=c8tsstf8ajiodlgrn3rqsr62b1&cat=c475_Spielekonsolen-Akku.html')

[XT SQL Error]