1366 - Incorrect integer value: '' for column `dogsdream`.`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', '4cd44d07a670891715afa3a830c5dbf4', '52.15.68.97', '1732271218', '1732271218', '/shop/product_info.php/info/p18_BIO---Wildschwein.html')

[XT SQL Error]