what happens and what should happen when an asker accepts a wrong answer? [duplicate]

Question

In this question (about how to check version number for numpy), they answer accepted by the asker, as been commented by multiple people, as not being neither standard, nor the recommended method.

What should be done in order to correct that ? (The asker seem to have been inactive for nearly the last 10 years)

Obviously, this is not a duplicate of «Why do incorrect answers keep getting “accepted”?». I don't care about the why. What I'm looking for is a way to solve the problem.

Here we have a situation where :
1/ It has been documented by multiple users, why the answer should not be the accepted one. It works, but the standards do not accept it as the recommended way of doing. And
2/ Since it is tagged as being the accepted answer, it receives supplementary likes from people which are glad with the first solution they find and won't even check comments or other answers

It is quite obvious than normal users won't be able to do it and that it requires help from someone with administrative rights. My question is about how we do that.

Answer 1

If it's wrong, downvote it. As someone other than the OP, that's all you can do. Future users will see the downvotes and can weigh that against the acceptance themselves. If there aren't any such comments already, you can also leave a comment noting what's wrong with the answer (although that answer already has comments).

People are free to accept answers as they see fit. Acceptance means that it helped them, not that the answer was the most correct. As a question asker, they likely aren't in a place to judge what answer is the most correct anyways.