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', '73drrdnfcqnct5vgbv2d6e9l42', '3.237.254.197', '1603703871', '1603703871', '/')

[XT SQL Error]