Hedera Hashgraph, a smart contracting for developing and deploying scalable dApps, is announcing changes on its testnet environments.
Quarterly resets
Per a tweet on Jan.13, hedera האט that every quarter, beginning Jan. 26, they will be resetting their mirror and consensus node test networks. Details such as account, token, contract, and more will be wiped.
Source: https://crypto.news/hedera-hashgraph-to-wipe-testnet-environments-every-quarter/