# Kava-5-1 Rollback Instructions In the event that the kava-5.1 relaunch is unsuccessful, we will restart the kava-6 chain using the last known state. In order to restore the previous chain, the following data must be recovered by validators: * The database that contains the state of the previous chain (in ~/.kvd/data by default) * The priv_validator_state.json file of the validator (in ~/.kvd/data by default) If you don't have the database data, the Kava developer team or another validator will share a copy of the database via Amazon s3 or a similar service. You will be able to download a copy of the data and verify it before starting your node. If you don't have the backup priv_validator_state.json file, you will not have double sign protection on the first block. If this is the case, it's best to consult in the validator discord before starting your node. ## Restoring state procedure 1. Copy the contents of your backup data directory back to the $KVD_HOME/data directory. By default this is ~/.kvd/data. ``` # Assumes backup is stored in "backup" directory rm -rf ~/.kvd/data mv backup/.kvd/data ~/.kvd/data ``` 2. Install the previous version of kava ``` # from kava directory git checkout v0.12.4 make install ## verify version kvd version --long ``` 3. Restart kvd process ``` ### be sure to remove --halt-time flag if it is set sudo systemctl daemon-reload sudo systemctl restart kvd ```