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', 'ekkp0udo9m3u936q5g1ughopd1', '3.144.107.36', '1738995425', '1738995425', '/index.php?XTCsid=qg0uqqo4jksa5ns63d51ihq545&cat=c31_Batterien.html')

[XT SQL Error]