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', 'o4m84tnvdu4gprtu6uut7lep32', '18.97.14.84', '1749962639', '1749962639', '/product_info.php?info=p67_804725-Einradhacke--Jaetmaschine--Kultivator.html')

[XT SQL Error]