'Updating SUPER OLD .sln to new Visual Studio Version

I'm looking for a way to update my visual studio 6.0 .sln file to a newer IDE like Visual Studio 2019. When I attempt to open it, it gives me the option of a one way upgrade, but I get errors such as:

"Unable to convert project. Please make sure this is a valid Visual C++ 6.0 project." on a .dsp file.

Is there a proper way to do this or do I need to re-install Visual Studio 2006 just to open this project? Thank you!



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