Yearn: A low version of Yearn Vault may be affected by the Ethereum fork, and it doesn't intend to support any PoW forks
According to BlockBeats, on September 6th, DeFi revenue aggregator Yearn released a new security guidance on its Github, reminding users that due to the Yearn Vault lower than version 0.4.4, it's Yearn Vault is vulnerable to replay attacks on the Ethereum PoW fork network, You are advised to reset the permit quota.
In addition, Yearn doesn't plan to support any Ethereum proof-of-work (PoW) forks after the merger, and it doesn't encourage the use of a licensed approach to Yearn Vault in other forked networks.