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', 'o4234uva5ci19dcklc0tvm4ab1', '18.117.183.104', '1738998878', '1738998878', '/index.php?XTCsid=nj57khd41hu8ciniagj0kmvlc3&cat=c937_Satelliten-Zubeh--r.html')

[XT SQL Error]