sqlite3.IntegrityError: NOT NULL constraint failed

Internal Server Error: /new/
Traceback (most recent call last):
  File "C:\Users\user\dev\facebook_project\django_env\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
    return self.cursor.execute(sql, params)
  File "C:\Users\user\dev\facebook_project\django_env\lib\site-packages\django\db\backends\sqlite3\base.py", line 383, in execute
    return Database.Cursor.execute(self, query, params)
sqlite3.IntegrityError: NOT NULL constraint failed: facebook_article.title

처음보는 낯선 에러였는데, models.py에서 Article클래스 중 title 필드의 값에 null=True를 추가로 기입하니 완료!