I am trying to build a .net app on railway. The app has sub projects and build fail when running "Run dotnet restore"

[6/9] RUN dotnet restore:
2.285 Determining projects to restore…
2.405 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/Service.Contracts/Service.Contracts.csproj]
2.405 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/Service/Service.csproj]
2.406 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/Entities/Entities.csproj]
2.406 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/Contracts/Contracts.csproj]
2.406 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/acheipro-api/acheipro-api.csproj]
2.406 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/LoggerService/LoggerService.csproj]

2.406 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/Shared/Shared.csproj]
2.407 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/AcheiProApi.Presentation/AcheiProApi.Presentation.csproj]

2.413 /nix/store/0f43yfx91hg74bcp66qkbp97zv3ln27i-dotnet-sdk-6.0.413/sdk/6.0.413/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.TargetFrameworkInference.targets(144,5): error NETSDK1045: The current .NET SDK does not support targeting .NET 7.0. Either target .NET 6.0 or lower, or use a version of the .NET SDKthat supports .NET 7.0. [/app/Repository/Repository.csproj]

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