Scaffolding Keyless Models on entity framework core 2.1

I have a simple console app and i am trying to scaffold all my models but i have some of them that does not have defined a primary key, Entity framework 2.1 give support to that kind of tables but still get this warning

Unable to identify the primary key for table 'dbo.myTable'.
Unable to generate entity type for table 'dbo.myTable'.

So then it doesn't generate the model

 dotnet ef dbcontext scaffold "Server=MyServer;Database=MyDb;Trusted_Connection=True;MultipleActiveResultSets=true" Microsoft.EntityFrameworkCore.SqlServer -o Models -f

Am I missing Any parameter or any help to scaffold models with no primary key defined?