Django – No such table: main.auth_user__old

Get rid of this issue easily maintaining the following steps:

1. keep django version 2.1.5 (the issue addressed in this version)
   pip install django==2.1.5
2. Delete the SQLite db
3. Migrate again python manage.py makemigrations and then python manage.py migrate
4. Start the server python manage.py runserver

DONE!