I had a question about Excel. So, I googled and SOd (if I may institute the verb). It turned out that the exact same question was already asked, Getting formula of another cell in target cell. There is only one answer, which is accepted. It essentially states that what the question asks cannot be done, and this coincides with many other links I found elsewhere, so I settled for that. Some time later, I found out other info which implied that the answer is not correct (EDIT and it was not correct at the time the answer was posted either; the correct answer did not change due to "evolution", as in Accepted answers which no longer work and What to do when the correct answer to a question changes over time?).
According to my experience (with questions asked by myself and others as well), these questions and their answers do not get enough attention. I expect then that posting another answer (which I deem correct, and I tested) would have some effect in propagating the correct answer, but certainly much milder than asking the question again (it might be given a twist, but it will aim at the same point) and posting the answer there. According to this observation, which addresses a main objective of SO (having good answers that serve well the asker and the community), it would be desirable to ask again. But this is evidently against the premises of SO.
So, I think there is a situation here where any of the two contraposed possible actions has some consequences which favor the essence of SO (and side effects which are undesired, of course).
What would the best option be?
PS1: Related questions
deal with accepted answers which do not do well based on voting. That is a separate issue. The point here is about: 1) asking again, 2) correct vs. incorrect.
PS2: This answer by David does not apply here, since the question would remain the same. The problem here is with the answer, which is the only one and it is accepted, a situation different from the one addressed by David.
Other related questions:
EDIT 2: I followed the suggestion below by Lance Roberts. The "predictions" were fulfilled... I posted the answer that I considered correct. It sparked a discussion with the poster of the previous accepted answer, where we could not come to an agreement. My answer was accepted as the new correct answer.