Reverse engineer on mysql not working (The annotation 'MySql:IndexPrefixLength' cannot be added because an annotation with the same name already exists.)

[manuel-zulian]

Reverse enginneering a mysql db doesn't work anymore after upgrading to the latest version (2.5), raising this output:

System.Exception: Reverse engineer error: 
System.InvalidOperationException: The annotation 'MySql:IndexPrefixLength' cannot be added because an annotation with the same name already exists.
   at Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.AddAnnotation(String name, Annotation annotation)
   at Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.AddAnnotation(String name, Object value)
   at Microsoft.EntityFrameworkCore.Infrastructure.Annotatable.Microsoft.EntityFrameworkCore.Metadata.IMutableAnnotatable.AddAnnotation(String name, Object value)
   at Microsoft.EntityFrameworkCore.MutableAnnotatableExtensions.AddAnnotations(IMutableAnnotatable annotatable, IEnumerable`1 annotations)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitIndex(EntityTypeBuilder builder, DatabaseIndex index)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitIndexes(EntityTypeBuilder builder, ICollection`1 indexes)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTable(ModelBuilder modelBuilder, DatabaseTable table)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTables(ModelBuilder modelBuilder, ICollection`1 tables)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitDatabaseModel(ModelBuilder modelBuilder, DatabaseModel databaseModel)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.Create(DatabaseModel databaseModel, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineerScaffolder.ScaffoldModel(String connectionString, DatabaseModelFactoryOptions databaseOptions, ModelReverseEngineerOptions modelOptions, ModelCodeGenerationOptions codeOptions)
   at ReverseEngineer20.ReverseEngineer.ReverseEngineerRunner.GenerateFiles(ReverseEngineerCommandOptions reverseEngineerOptions) in C:\Code\EFCorePowerTools\src\GUI\RevEng.Core\ReverseEngineerRunner.cs:line 114
   at efreveng.Program.Main(String[] args) in C:\Code\EFCorePowerTools\src\GUI\efreveng\Program.cs:line 68

   at EFCorePowerTools.Handlers.ReverseEngineer.ResultDeserializer.BuildResult(String output) in C:\projects\efcorepowertools\src\GUI\EFCorePowerTools\Handlers\ReverseEngineer\ResultDeserializer.cs:line 27
   at ReverseEngineer20.ReverseEngineer.EfRevEngLauncher.GetOutput() in C:\projects\efcorepowertools\src\GUI\EFCorePowerTools\Handlers\ReverseEngineer\EfRevEngLauncher.cs:line 112
   at ReverseEngineer20.ReverseEngineer.EfRevEngLauncher.LaunchExternalRunner(ReverseEngineerOptions options, Boolean useEFCore5) in C:\projects\efcorepowertools\src\GUI\EFCorePowerTools\Handlers\ReverseEngineer\EfRevEngLauncher.cs:line 51
   at EFCorePowerTools.Handlers.ReverseEngineerHandler.<ReverseEngineerCodeFirstAsync>d__3.MoveNext() in C:\projects\efcorepowertools\src\GUI\EFCorePowerTools\Handlers\ReverseEngineerHandler.cs:line 264

It seems to be a problem in the pomelo lilbrary (PomeloFoundation/Pomelo.EntityFrameworkCore.MySql#1189), but it seems ef power tools does not include the fix (yet).

Steps to reproduce

Check PomeloFoundation/Pomelo.EntityFrameworkCore.MySql#1189

Further technical details

EF Core Power Tools version: (found in About dialog - blue questionmark icon on context menu)
2.5.277.0

Database engine: (SQlite, SQL Compact, SQL Server, Postgres)
MySql

Visual Studio version: (e.g. Visual Studio 2017 15.7)
16.8

[ErikEJ]

Fixed in latest daily build (.279 or later)