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', 'u0816povth9c4odcfe0o6lov52', '44.220.245.254', '1710832315', '1710832315', '/index.php/cat/c1_Candle.html')

[XT SQL Error]