I created a model for posts in Django and I'm trying to update one of the fields in the database (MySQL).
I have the following block of code:
model.py

```
class Post (models.Model):
    title = models.CharField()
    preamble = models.CharField()
    body = models.TextField ()
createdAt = models.DateTimeField(auto_now_add=True, blank=True)

```

I want to add another field called author `author=models.ForeignKey(User, on_delete=models.CASCADE`
Also, I want to change the name of one of the fields from `preamble` to `introduction`

Whenever I run the command `python manage.py makemigrations` and then `python manage.py migrate`, I get an error which terminates the migration process. it's telling me that the field `preamble` which I have in my database is not recognized. Is it possible to update `preamble` to `introduction`?