title: Unable to find source of: ERROR [root] Error: Can't locate revision identified by '..'
body: <p>I am trying to run migrations from command line and keep getting error:
  <code>ERROR [root] Error: Can't locate revision identified by 'faf3ebfbe667'</code></p>
  
  <p>As suggested in other posts I deleted my sqlite db and migration folder (several times). I recreated virtual environment as well. I checked all files in my project folder for a reference to the revision and I cant find anything there. The error persists.
  I tried to drop alembic_version in db but such table does not exists.</p>
  
  <p>I try to run migrations from comand line as below:</p>
  
  <pre><code>set FLASK_APP=my_app/__init__.py
  flask db init
  flask db migrate
  flask db upgrade
  </code></pre>