python - Django 「定義に related_name 引数を追加する」エラー

Question

models.py

class BaseComment(models.Model):
    comment_author = models.ForeignKey(MyUser, related_name='written_comments')
    comment_content = models.CharField(max_length=500)
    comment_date = models.DateTimeField(auto_now_add=True)
    rating = models.IntegerField(default=0)
    users_voted = models.ManyToManyField(MyUser, related_name='voted_comments')

    class Meta:
        abstract = True
        ordering = ['-comment_date']        

    def __unicode__(self):
        return self.comment_author.email

class QuestionComment(BaseComment):
    question = models.ForeignKey(Question, related_name='comments')

class AnswerComment(BaseComment):
    answer = models.ForeignKey(Answer, related_name='comments')

これは私のmodels.pyです。syncdb を実行すると、次のエラーが表示されます。

CommandError: One or more models did not validate:

app_quora.questioncomment: Accessor for field 'comment_author' clashes with rela
ted field 'MyUser.written_comments'. Add a related_name argument to the definiti
on for 'comment_author'.
app_quora.questioncomment: Reverse query name for field 'comment_author' clashes
 with related field 'MyUser.written_comments'. Add a related_name argument to th
e definition for 'comment_author'.
app_quora.questioncomment: Accessor for m2m field 'users_voted' clashes with rel
ated m2m field 'MyUser.voted_comments'. Add a related_name argument to the defin
ition for 'users_voted'.
app_quora.questioncomment: Reverse query name for m2m field 'users_voted' clashe
s with related m2m field 'MyUser.voted_comments'. Add a related_name argument to
 the definition for 'users_voted'.
app_quora.answercomment: Accessor for field 'comment_author' clashes with relate
d field 'MyUser.written_comments'. Add a related_name argument to the definition
 for 'comment_author'.
app_quora.answercomment: Reverse query name for field 'comment_author' clashes w
ith related field 'MyUser.written_comments'. Add a related_name argument to the 
definition for 'comment_author'.
app_quora.answercomment: Accessor for m2m field 'users_voted' clashes with relat
ed m2m field 'MyUser.voted_comments'. Add a related_name argument to the definit
ion for 'users_voted'.
app_quora.answercomment: Reverse query name for m2m field 'users_voted' clashes 
with related m2m field 'MyUser.voted_comments'. Add a related_name argument to t
he definition for 'users_voted'.

さて、エラーは、「comment_author」と「users_voted」の両方に「related_name」を追加するように指示しますが、これはすでに行っています!!. 私はstackoverflowで同様の質問を調べましたが、通常、問題は、人々がフィールドを衝突させるためのこの「related_name」を持っていなかったことです。

このフィールドを追加しましたが、まだこのエラーが発生しています...誰か理由を説明できますか?

ありがとう ：（（（