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', 'adb8a8a987924d7adfbf1ea693596980', '3.239.95.36', '1716638287', '1716638287', '/')

[XT SQL Error]