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', 'bclsah0ms2hh5tu2nuf8h811u3', '3.137.223.191', '1738995713', '1738995713', '/index.php?XTCsid=8km4iag7d9anolhh9c02p13aq2&cat=c642_Kabel.html')

[XT SQL Error]