Upgrading Multiplayer PlayMode to 1.3.0 - Assembly Loading Failure

[jglassacc]

Description

After upgrading Multiplayer PlayMode 1.3.0, an assembly conflict exists causing non-compilation.

Assembly with name 'Unity.Multiplayer.Playmode.Common.Editor' already exists (Packages/com.unity.multiplayer.playmode/Common/Editor/Unity.Multiplayer.Playmode.Common.Editor.asmdef)

Assembly with name 'Unity.Multiplayer.Playmode.Common.Editor' already exists (Packages/com.unity.multiplayer.playmode/Common/Editor/Unity.Multiplayer.PlayMode.Common.Editor.asmdef)

Assembly with name 'Unity.Multiplayer.Playmode.Common.Runtime' already exists (Packages/com.unity.multiplayer.playmode/Common/Runtime/Unity.Multiplayer.Playmode.Common.Runtime.asmdef)

Assembly with name 'Unity.Multiplayer.Playmode.Common.Runtime' already exists (Packages/com.unity.multiplayer.playmode/Common/Runtime/Unity.Multiplayer.PlayMode.Common.Runtime.asmdef)

In the later part of each of the assemblies, there are duplicates: Unity.Multiplayer.Playmode.Common.Runtime.asmdef Unity.Multiplayer.PlayMode.Common.Runtime.asmdef

Reproduce Steps

1. Open or Create a project in Unity 6 Preview
2. Install Multiplayer Services 1.0.0 and Netcode for GameObjects 2.0.0
3. Install the "Multiplayer Playmode" 1.2.2 package from the Package Manager
4. Upgrade PlayMode to 1.3.0 through the Packagae Manager
5. After installation, the error will be shown in the console

Environment

• OS: Microsoft Windows 11 Pro (Version 10.0.22631 Build 22631)
• Unity Version: 6000.0.22f1
• Netcode Version: Netcode for GameObjects 2.0.0 >> Multiplayer Play Mode 1.3.0

Additional Context

[jglassacc]

Some additional testing:

• Creating an empty game project and installing NGO 2.0.0, PlayMode 1.3.0 and Services 1.0.0 DOES NOT cause this issue
• If you however install PlayMode 1.2.2 and then upgrade it, it will happen
• Removing the package and downgrading, fixes the issue
• A subsequent upgrade will cause the issue again