This release defines the block number for the Madhugiri HF in amoy, at block height 28899616, expected on Tue, Nov 11, 2025, 10:30 AM UTC.
For node operators upgrading from v3.0.x a resync might be needed. After upgrading your Erigon binary and having done a back-up of your data directory, you can delete data folders and sync from scratch (chaindata, heimdall, and polygon-bridge).