Python – Django – No such table: main.auth_user__old

I was following the first app tutorial from the official Django docs and got this error when trying to save some changes made through the admin page. I did some research on it, but the possible solutions I was able to find, such as migrating the db, simply won't work. Just let me know if you want to see some specific part of my code.

Following is error:

OperationalError at /admin/polls/question/1/change/ no such table:
main.auth_user__old Request Method: POST Request
URL: http://127.0.0.1:8000/admin/polls/question/1/change/ Django
Version: 2.1.4 Exception Type: OperationalError Exception Value: no
such table: main.auth_user__old Exception
Location: /Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/sqlite3/base.py
in execute, line 296 Python
Executable: /Users/gfioravante/Projects/test_app/ta_env/bin/python3
Python Version: 3.7.1 Python Path:
['/Users/gfioravante/Projects/test_app/test_app',
'/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python37.zip',
'/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7',
'/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload',
'/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages']
Server time: Wed, 5 Dec 2018 16:45:00 +0000

and the traceback:

Environment:

Request Method: POST Request URL:
http://127.0.0.1:8000/admin/polls/question/1/change/

Django Version: 2.1.4 Python Version: 3.7.1 Installed Applications:
['polls.apps.PollsConfig', 'django.contrib.admin',
'django.contrib.auth', 'django.contrib.contenttypes',
'django.contrib.sessions', 'django.contrib.messages',
'django.contrib.staticfiles'] Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']

Traceback:

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/utils.py"
in _execute
85. return self.cursor.execute(sql, params)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/sqlite3/base.py"
in execute
296. return Database.Cursor.execute(self, query, params)

The above exception (no such table: main.auth_user__old) was the
direct cause of the following exception:

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/core/handlers/exception.py"
in inner
34. response = get_response(request)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/core/handlers/base.py"
in _get_response
126. response = self.process_exception_by_middleware(e, request)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/core/handlers/base.py"
in _get_response
124. response = wrapped_callback(request, *callback_args, **callback_kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/options.py"
in wrapper
604. return self.admin_site.admin_view(view)(*args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/utils/decorators.py"
in _wrapped_view
142. response = view_func(request, *args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/views/decorators/cache.py"
in _wrapped_view_func
44. response = view_func(request, *args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/sites.py" in inner
223. return view(request, *args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/options.py"
in change_view
1640. return self.changeform_view(request, object_id, form_url, extra_context)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/utils/decorators.py"
in _wrapper
45. return bound_method(*args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/utils/decorators.py"
in _wrapped_view
142. response = view_func(request, *args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/options.py"
in changeform_view
1525. return self._changeform_view(request, object_id, form_url, extra_context)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/options.py"
in _changeform_view
1571. self.log_change(request, new_object, change_message)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/options.py"
in log_change
826. change_message=message,

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/contrib/admin/models.py"
in log_action
35. change_message=change_message,

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/manager.py"
in manager_method
82. return getattr(self.get_queryset(), name)(*args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/query.py"
in create
413. obj.save(force_insert=True, using=self.db)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/base.py"
in save
718. force_update=force_update, update_fields=update_fields)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/base.py"
in save_base
748. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/base.py"
in _save_table
831. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/base.py"
in _do_insert
869. using=using, raw=raw)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/manager.py"
in manager_method
82. return getattr(self.get_queryset(), name)(*args, **kwargs)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/query.py"
in _insert
1136. return query.get_compiler(using=using).execute_sql(return_id)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/models/sql/compiler.py"
in execute_sql
1289. cursor.execute(sql, params)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/utils.py"
in execute
100. return super().execute(sql, params)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/utils.py"
in execute
68. return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/utils.py"
in _execute_with_wrappers
77. return executor(sql, params, many, context)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/utils.py"
in _execute
85. return self.cursor.execute(sql, params)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/utils.py"
in exit
89. raise dj_exc_value.with_traceback(traceback) from exc_value

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/utils.py"
in _execute
85. return self.cursor.execute(sql, params)

File
"/Users/gfioravante/Projects/test_app/ta_env/lib/python3.7/site-packages/django/db/backends/sqlite3/base.py"
in execute
296. return Database.Cursor.execute(self, query, params)

Exception Type: OperationalError at /admin/polls/question/1/change/
Exception Value: no such table: main.auth_user__old