> For the complete documentation index, see [llms.txt](https://docs.coherence.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.coherence.io/2.3/support/upgrading-unity-sdk/upgrade-1.6-greater-than-1.7.md).

# Upgrade 1.6 -> 1.7

## Multi-Room Simulators — Removed

Starting from 1.7.0, Multi-Room Simulators have been removed from the SDK. If your project was using this feature, you will no longer be able to work with it.

Note that CoherenceScene and CoherenceSceneLoader — the core components that allow Multi-Room Simulators — are **not deprecated**. You can read more about them on [Multiple Connections within a Game Instance](/2.3/manual/multiple-connections-within-a-game-instance.md).


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