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', '56fc05f897a4fac1b44789830068f716', '3.135.183.89', '1714099982', '1714099982', '/shop/product_info.php/info/p4_BIO---Ingwer---Algenplaetzchen-Gro-packung.html')

[XT SQL Error]