Django Migration Error in Heroku, but migrate correctly in heroku local

Python 3.5, Django 1.10.3, Sqlite
I have deployed a django app in heroku.It ran without errors before. One day I make some change in models.py. I first do
python manage.py collectstatic,
python manage.py makemigrations,
python manage.py migrate,
heroku local web -f Procfile.windows,
the app run correctly in local. Then I push my codes to heroku. I ran:
git push heroku master
heroku run bash
$python manage.py makemigrations
$python manage.py migrate
heroku ps:scale web=1
But server returned:

    ProgrammingError at /twitter/blog/      column twitter_article.enable_comments does not exist      LINE 1: ...article"."content", "twitter_article"."pub_date", "twitter_a.

Here is my key model:

    from django.db import models      from fluent_comments.moderation import moderate_model,comments_are_open, comments_are_moderated      from fluent_comments.models import get_comments_for_model, CommentsRelation        class Article(models.Model) :      title = models.CharField(max_length = 100)      category = models.CharField(max_length = 50, blank = True)      pub_date = models.DateTimeField(auto_now_add = True)      content = models.TextField(blank = True, null = True)      pub_date = models.DateTimeField("pub_date")      enable_comments = models.BooleanField("Enable comments", default=True)        def __str__(self) :          return self.title        class Meta:          ordering = ['-pub_date']        # Optional, give direct access to moderation info via the model:      comments = property(get_comments_for_model)      comments_are_open = property(comments_are_open)      comments_are_moderated = property(comments_are_moderated)        # Give the generic app support for moderation by django-fluent-comments:      moderate_model(Article,          publication_date_field='pub_date',          enable_comments_field='enable_comments',      )

If I drop my database and build a new database. Server won't report error. Why? I'm using sqlite.

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