1366 - Incorrect integer value: '' for column `shop_db3`.`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', 'a25a377c307184a79187851bf547a52b', '18.217.220.114', '1713994624', '1713994624', '/product_info.php?info=p320_Easy-Tunes--F-Instrumente-.html&XTCsid=26fedc8b3cbf5330d12a051fef4e732f')

[XT SQL Error]