Database Error!

Error: Field 'last_seen' doesn't have a default value
Query: INSERT INTO users (uid, password, ip_address, first_seen) VALUES ("5efdccb1325ff9.32687477", "Umq96MsEycckH5Cwu5a8Ymm2kgatTK6X", "3.236.52.197", UNIX_TIMESTAMP())
File: /includes/database.class.php
Line: 98
Backtrace: