error MSB4018: The "DiscoverPrecompressedAssets" task failed unexpectedly. An item with the same key has already been added

[dotfede]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

After upgrading to .NET SDK 9.0.3, I keep getting this error when building both blazor and aspnet core projects containing static assets such as html or css files. This happens when building from the command line as well as in Visual Studio 2022.

Seems to be the same as: #59476

Deleting obj folder and rebuilding via dotnet build works, but it is extremely annoying.

Expected Behavior

Build should succeed normally.

Steps To Reproduce

No response

Exceptions (if any)

No response

.NET Version

9.0.300

Anything else?

No response

[martincostello]

Duplicate of dotnet/sdk#49180.

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