testnet branch (ac60dff).Before upgrade please install clang-21 or higher (it is mandatory now, instruction is here). And remove openssl binaries compiled by previous TON instalations:
sudo rm -rf /usr/bin/openssl_3
After that update as following:
update openssl35
upgrade testnet
⚠️ On January 19, in the second half of the day, a network configuration update may cause nodes that are not updated to be unable to store all blocks. If preserving full history is important for your installation, please update immediately or shut down your nodes until the update is applied.