1366 - Incorrect integer value: '' for column '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', '7chicg4b9jp6en89vd1pg46i76', '3.239.56.184', '1620680859', '1620680859', '/')

[XT SQL Error]