1366 - Incorrect integer value: '' for column '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', 'j5n3sh2qsnj32qu72r6jd9j9s3', '216.73.216.119', '1758026516', '1758026516', '/xtshop/product_info.php?info=p997_.html')

[XT SQL Error]