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', '40rb5jeuf8bsl3tp70i1s07kd3', '3.15.182.56', '1746788700', '1746788700', '/product_info.php?info=p36_801380-Handschrotmuehle--Getreidemuehle.html')

[XT SQL Error]