Error when updating TM in GroupShare 2017 SR1: Response status code does not indicate success: 409 (Conflict)

Hi SDL Community

We experience the below error whenever we try to Update a Server-TM on GroupShare 2017 SR1 using the Studio API.

It worked well with Studio 2017 SR1 Version 5.1.20356.0 before the update to GroupShare 2017 SR1

With Studio 2019 SR1 Version 15.1.0.44109 it now throws the error.

Can someone tell me what's going wrong here with our code? What has changed?

Any suggestions are highly welcome!

error message:

SDL Trados Studio -

[443] E:\fileShare\233_443_de-DE_pl-PL\Files\233_443_XYZ_de-DE_pl-PL.sdlrpx: System.AggregateException: One or more errors occurred. ---> System.Net.Http.HttpRequestException: Response status code does not indicate success: 409 (Conflict). at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode() at Sdl.TmService.Sdk.TmServiceRestClient.d__43.MoveNext() --- End of inner exception stack trace --- at Sdl.TmService.Sdk.TmServiceRestClient.UpdateTranslationMemory(TranslationMemory tm) at Sdl.LanguagePlatform.TranslationMemoryApi.InternalRestClient.UpdateTranslationMemory(TranslationMemoryEntity translationMemoryEntity) at Sdl.LanguagePlatform.ServerBasedTranslationMemory.Client.TranslationMemoryAdministrationClient.UpdateTranslationMemory(TranslationMemoryEntity translationMemoryEntity) at Sdl.LanguagePlatform.TranslationMemoryApi.ServerBasedTranslationMemory.Save() at SDLcall.SDLCall.GetUpdateTmTaskSettings(FileBasedProject project, ServerBasedTranslationMemory tm, Language language) in I:\Develop\VS2013\XYZTC\SDLcall\SDLcall\SDLCall.vb:line 2369 at SDLcall.SDLCall.SDLReturnPackage() in I:\Develop\VS2013\XYZTC\SDLcall\SDLcall\SDLCall.vb:line 1634 ---> (Inner Exception #0) System.Net.Http.HttpRequestException: Response status code does not indicate success: 409 (Conflict). at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode() at Sdl.TmService.Sdk.TmServiceRestClient.d__43.MoveNext()<---