1366 - Incorrect integer value: '' for column `db162720`.`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', 'g3rf019fogv9si884f70thu2q5', '3.236.221.156', '1656576351', '1656576351', '/product_info.php/info/p266_.html')

[XT SQL Error]