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', '8l6if6ps0p8r66joo4ktkti4t3', '3.138.121.206', '1738994995', '1738994995', '/index.php?XTCsid=qg0uqqo4jksa5ns63d51ihq545&cat=c519_Apple.html')

[XT SQL Error]