# Should I edit my answer after an edit/clarification to the question?

This is just an example, but here: Chain Puzzle

The original question did not stipulate the required length of the chain. With a bit of abuse to this I answered as can be seen in the question. (TL;DR - hook all the chains together through a single set of links).

My question is: What is the appropriate action for an answerer to take once the OP has changed/clarified the original question?
In the aforementioned example, I edited my post to clearly indicate that my answer was for a previous incarnation and was no longer technically valid.