If an incorrect transaction is entered in a blockchain, what happens?

When an incorrect transaction is entered into a blockchain, the blockchain's design ensures transparency and immutability. It does not allow for deletion or alteration of existing transactions, which is a key feature that maintains the integrity and trustworthiness of the ledger. Therefore, if an error is made, the appropriate course of action is to process a new transaction that can effectively cancel out or correct the effects of the original incorrect transaction.

This means that rather than trying to amend the original record, a new entry is recorded in the blockchain. This new transaction will reflect the necessary changes or corrections, keeping the original incorrect transaction visible but providing a clear trail of all actions for all parties involved. This process upholds the principles of accountability and traceability that are foundational to blockchain technology.

The other options do not align with the operational principles of blockchain. Transactions cannot be deleted, and the ledger’s state remains intact and non-mutable, meaning that the old entry remains part of the historical record. The ledger is also not frozen, as transactions can continue to be added, and there are no provisions for making corrections without a new transaction.