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', 'a2d0i1e5pebvdcv575e7af7jr5', '216.73.216.47', '1758058240', '1758058240', '/product_info.php?info=p34_800598-Hand-Hackfruchtreibe.html')

[XT SQL Error]