title: The name 'Initial' is used by an existing migration
body: <p>I have this configurations:
  ABP Framework: 4.2.1
  User Interface: MVC
  Database Provider: EF Core / PostgreSQL
  Exception: The name 'Initial' is used by an existing migration.</p>
  <p>When I start a new project, and run the command dotnet run in DbMigrator I got the error: The name 'Initial' is used by an existing migration.</p>
  <p><a href="https://i.stack.imgur.com/GaR8E.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/GaR8E.png" alt="configuration" /></a></p>
  <p>In the migrations folder, I only have a Initial migrations</p>
  <p><a href="https://i.stack.imgur.com/npltt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/npltt.png" alt="enter image description here" /></a></p>