How to fix-no such table: main.auth_user__old

Question

Can someone give a detailed explanation on how to fix the ERROR: no such table: main.auth_user__old

It arises in my Django application when I am trying to a

Answer 1

This happened to me as a newbie, whilst following Mosh's intro course on the final project 3: Django. This is the fix, usually using Pycharm or it's equivalent (no need to change any of your code):

1. close any terminal windows in PyCharm or other 'runserver' instances
2. delete db.sqlite3

Then upgrade Django like this in a terminal window pip install --upgrade django==2.1.5 Once it's done, you rebuild.

3. open a terminal window in PyCharm, type: python manage.py makemigrations and hit enter. It should say no changes detected.
4. Then type: python manage.py migrate, it'll rebuild db.sqlite3
5. Then: python manage.py runserver and let that run.
6. Open a new terminal, type python manage.py createsuperuser and follow prompts.
7. Open http://127.0.0.1:8000/admin , enter the details you just created, and you're working.