# FAQ

Here are some of the most frequently asked questions about Conduit, and their answers.

## Why do I get a `M_INCOMPATIBLE_ROOM_VERSION` error when trying to join some rooms?

Conduit doesn't support room versions 1 and 2 at all, and doesn't properly support versions 3-5 currently. You can track the progress of adding support [here](https://gitlab.com/famedly/conduit/-/issues/433).

## How do I setup sliding sync?

You need to add a `org.matrix.msc3575.proxy` field to your `.well-known/matrix/client` response which points to Conduit. Here is an example:
```json
{
  "m.homeserver": {
    "base_url": "https://matrix.example.org"
  },
  "org.matrix.msc3575.proxy": {
    "url": "https://matrix.example.org"
  }
}
```

## Can I migrate from Synapse to Conduit?

Not really. You can reuse the domain of your current server with Conduit, but you have to leave all federated rooms first.