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', '67a522e746a520d4a4689839baa174cd', '3.235.186.149', '1711709390', '1711709390', '/product_info.php?info=p53_Fruehling-an-der-Donau--Waltz-.html&XTCsid=cb0ad84d7acc90898c9ea3492fbc1557')

[XT SQL Error]