Set wsl --set-default-version 2 failure on OS version win10 multi-session

[Julia082]

Version: windows 10 enterprise multi-session(WVD).
version 20H2 (OS build 19042.1165)

Follow steps that can successful setup on win10 but multi-session will be failure when wsl set default version 2.
https://docs.microsoft.com/en-us/windows/wsl/install-win10

PS C:\Users\azureuser> wsl --set-default-version 2
Copyright (c) Microsoft Corporation. All rights reserved.

Usage: wsl.exe [Argument] [Options...] [CommandLine]

Arguments for running Linux binaries:

If no command line is provided, wsl.exe launches the default shell.

[Julia082]

anyone met it?