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', 'kc59shvi068msv1h9skmgrjkk0', '3.214.224.224', '1582082090', '1582082090', '/')

[XT SQL Error]