Database Error!

Error: Field 'last_seen' doesn't have a default value
Query: INSERT INTO users (uid, password, ip_address, first_seen) VALUES ("5e31eb77737c25.85557942", "NR0sHmpQM2oWCvkfOah5eRCHetl1WRau", "3.229.142.175", UNIX_TIMESTAMP())
File: /includes/database.class.php
Line: 98
Backtrace: