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', 'fp7ancqikbag57qqg5dbko39r6', '3.236.221.156', '1656575656', '1656575656', '/index.php/cat/c7_.html')

[XT SQL Error]