To upgrade your chain from v0.39 (Launchpad) and earlier to Stargate, you must migrate your keys inside the keyring to the latest version. For details on configuring and using the keyring, see [Setting up the keyring](../run-node/keyring.md).
This guide describes how to migrate your keyrings.
The following command migrates your keyrings:
```bash
Usage
simd keys migrate <old_home_dir>
```
The migration process moves key information from the legacy db-based Keybase to the [keyring](https://github.com/99designs/keyring)-based Keyring. The legacy Keybase persists keys in a LevelDB database in a 'keys' sub-directory of the client application home directory (`old_home_dir`). For example, `$HOME/.gaiacli/keys/` for [Gaia](https://github.com/cosmos/gaia).
You can migrate or skip the migration for each key entry found in the specified `old_home_dir` directory. Each key migration requires a valid passphrase. If an invalid passphrase is entered, the command exits. Run the command again to restart the keyring migration.
-`--keyring-backend` string flag. It allows you to select a backend. For more detailed information about the available backends, you can read [the keyring guide](../run-node/keyring.md).