I posted a question "Chopin Etude How to play C-flat". It was marked as duplicate with a standard signage "This question has been asked before and already has an answer...edit this question to explain how it is different..(my emphasis). So I did just that. Then Dom rolled back my edit with the message Don't try and explain why your question should be reopened in your question. Take it to the meta. I ask for anyone who is NOT Dom to look at the reason because it's blindingly obvious that mine is a new question.
First of thanks for taking this to the meta so we can discuss this in detail.
Let's start off with why I and others closed it as a duplicate. Here's the whole question:
Chopin Etude Op. 9 No. 2 In the 13th full bar, Right hand 5th note. My music sheet shows a Cb. What, I puzzle, is a C-flat? Should it be there? Should it be played as B natural followed by B-flat?
The bolded part is the core question. We talk about this concept which is called enharmonic equivalence a lot on this site and this is one example of it.
The B# question asks the exact same concept on a different note which is why I voted to close as a duplicate and if you look at the answers for your question and the other question, you'll see they are extremely similar in nature with the only difference being the exact note.
This was your edit that you made to your post:
I disagree that this question duplicates the question What does this note - B# - mean? which concerns a different note in a different key played on an unspecified instrument not necessarily a piano, and probably not composed by Chopin.
The key is different yes, the note is different yes, the instrument is piano which is the same, and the composer is different. This is not why it was closed as a duplicate though as I said in a comment:
It's the same concept on a different note that's why it's a duplicate. It's even the exact inverse scenario so it should be easy to see what's going on.
The concept which was not addressed by your edit was the same. I rolled it back because the edit read more like a meta post then clarification for the question and adding details which is what the edit was suppose to be to get it reopened.
There have been other questions that were mainly about a topic already discussed that were closed as a duplicate, but later reopened after changing the focus of the question slightly. This question is one recent example.
If there is something that the other question does not address that you want answered (i.e. besides what a Cb is as that question covers the general concept of enharmonic equivalence which is what that question is), you can either edit your question to clarify that or ask a new one.