1366 - Incorrect integer value: '' for column `pella-ware`.`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', '825vo393gl2ua5ika9357510k1', '54.221.69.42', '1711715905', '1711715905', '/login.php?XTCsid=825vo393gl2ua5ika9357510k1')

[XT SQL Error]