title: Work on multiple branches with Flask-Migrate
body: <p>I'm using Flask-Migrate (Alembic) to manage SQLAlchemy database migrations. I'm working on two different branches with different migrations. </p>
  
  <ol>
  <li>If I switch branches, I get an error that the migration is not found.</li>
  <li>If i merge this branches into the parent branch, I need downgrade migration's on both multiple branches and create new one. If I will not, I get migration's conflict error. </li>
  </ol>
  
  <p>How can I do it easier? Maybe another tool that more like Django's migrations, but for Flask?</p>