Hedera Testnet will remain on v0.15.1 (release notes: https://hedera.io/release-notes
) on Tuesday 29th 2021 at 18:00 UTC. We will be rejoining node 3, the restart will take approximately 2 hours to complete, during which time all network services on the Hedera Testnet will be offline. This upgrade should not affect your project's compatibility or data. As a precaution, we always recommend preserving project data prior to any Testnet upgrade.