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', 'c8r2ojbki69e171k5sjcoe1bt4', '3.145.102.112', '1738994671', '1738994671', '/index.php?XTCsid=mgdqk1fhm8rf8rhaciivk3tpt2&cat=c1301_Li-Polymer-Akkus.html')

[XT SQL Error]