Django transitions

I am trying to create a blog in django. I got to creating models. Here they are:

from django.db import models

import uuid

class Users(models.Model):
    username = models.CharField(max_length = 32, primary_key = True)
    password = models.CharField(max_length = 32)
    email = models.EmailField()
    registration_date = models.DateTimeField(auto_now_add = True)

class Posts(models.Model):
    author = models.ForeignKey("Users")
    header = models.CharField(max_length=100)
    body = models.TextField()
    pub_date = models.DateTimeField(auto_now_add = True)
    mod_date = models.DateTimeField(auto_now = True)
    upvotes = models.PositiveIntegerField()
    views = models.PositiveIntegerField()
    post_id = models.AutoField(primary_key = True)

class Answers(models.Model):
    body = models.TextField()
    author = models.ForeignKey("Users")
    pub_date = models.DateTimeField(auto_now_add = True)
    mod_date = models.DateTimeField(auto_now = True)
    post = models.ForeignKey("Posts")
    answer_id = models.UUIDField(primary_key = True, default=uuid.uuid4)

      

        
        
        
      

    

After running, python manage.py migrate

I get the following:

You are trying to add a field without a 'post_id' column to posts without a default; we cannot do this (the database needs to be tagged to populate existing rows). Pick a solution:
1) Provide a one-off default (will be set for all existing rows)
2) Close and add the default to models.py

Even if I press 1 and try to set a random nonce it migrates successfully, but later the website crashes "without such a table: blog_posts". But I think this should work without workarounds like manually setting the default.

I tried playing with the primary keys for messages and responses. I tried to remove them completely so that django would automatically install them itself and tried to change it from AutoField to UUIDField and vice versa, but that didn't work. What am I doing wrong?