Fuel Core v0.45.1 is now available and is backwards compatible, so upgrading is not immediately required. However, this release increases P2P bandwidth capacity limits. As network throughput (TPS) increases, nodes running older versions may fall behind.
We don’t expect a sudden spike in activity, but we highly recommend all node operators upgrade soon to avoid potential sync issues.
Testnet will be upgraded on August 4 '25, and Mainnet on August 11 '25.
Release notes: Release v0.45.1 · FuelLabs/fuel-core · GitHub