重命名项：拒绝访问路径（Flutter升级）

My previous Flutter version is installed in C:\src\flutter.

当我尝试升级Flutter时，出现以下错误：

Downloading Dart SDK from Flutter engine
Rename-Item : Access to the path 'C:\src\flutter\bin\cache\dart-sdk' is denied.
At C:\src\flutter\bin\internal\update_dart_sdk.ps1:51 char:5
+     Rename-Item $dartSdkPath "$oldDartSdkPrefix$oldDartSdkSuffix"
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (C:\src\flutter\bin\cache\dart-sdk:String) [Rename-Item], IOException
    + FullyQualifiedErrorId : RenameItemIOError,Microsoft.PowerShell.Commands.RenameItemCommand

我认为我在Windows上的驱动器权限有问题，但是我不知道如何解决。