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', 'qsfsgnjg0uh5kblqaua539gst7', '216.73.216.30', '1751834695', '1751834695', '/product_info.php?info=p610_Stehtisch-warm--Feuertonne--ohne-Ofenrohrhaube-.html')

[XT SQL Error]