1366 - Incorrect integer value: '' for column `hbl_shop`.`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', 'qiub38tfmp7skm9k0ge28cj0c5', '3.139.237.218', '1746788543', '1746788543', '/product_info.php?info=p34_800598-Hand-Hackfruchtreibe-Standard.html')

[XT SQL Error]