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', 'fc2ihcqgm87kote04gbh3dl5k2', '216.73.216.178', '1769080880', '1769080880', '/index.php?XTCsid=3b147b8f13a7f162d315476fb5c01d44')

[XT SQL Error]