title: How to add a user in the admin page?(getting error)
body: <p>Django version: <strong>2.1.5</strong></p>
  
  <p>When I tried to add a user in the admin page it gave me this error:</p>
  
  <pre><code>OperationalError at /admin/auth/user/add/
  
  no such table: main.auth_user__old
  Request Method: POST
  Request URL:    http://localhost:8000/admin/auth/user/add/
  Django Version: 2.1.5
  Exception Type: OperationalError
  Exception Value:    
  no such table: main.auth_user__old
  Exception Location: C:\Users\themi\Envs\project\lib\site-packages\django\db\backends\sqlite3\base.py in execute, line 298
  Python Executable:  C:\Users\themi\Envs\project\Scripts\python.exe
  Python Version: 3.8.2
  Python Path:    
  ['C:\\Users\\themi\\OneDrive\\Desktop\\myfirstdjango',
   'C:\\Users\\themi\\Envs\\project\\Scripts\\python38.zip',
   'c:\\users\\themi\\appdata\\local\\programs\\python\\python38-32\\DLLs',
   'c:\\users\\themi\\appdata\\local\\programs\\python\\python38-32\\lib',
   'c:\\users\\themi\\appdata\\local\\programs\\python\\python38-32',
   'C:\\Users\\themi\\Envs\\project',
   'C:\\Users\\themi\\Envs\\project\\lib\\site-packages']
  Server time:    Sun, 22 Mar 2020 07:47:59 +0000
  </code></pre>
  
  <p>I know this question has been answered before but the solutions didn't work for me.</p>