The scenario is that the OP (of the answer) intially posted an answer to a question, which then received many upvotes and was accepted by the asker. However, later the OP completely changed his answer.
The votes that were cast were for the initial answer and not the now altered answer. The answer that was accepted was also the original answer. However the current answer is radically different.
Now, how should this situation be dealt with ? (Generally)
One example that I came across. Whats the appropriate action in this specific scenario?