This question asked "What is this thing?"
My answer was "I think it's a foo."
Someone else answered "It's a bar". They are right.
I have seen What should I do if I decided my upvoted answer is wrong, but my case is slightly different - specifically there is already a (more highly voted) correct answer.
Editing my answer to improve it would just turn it into a clone of an existing answer. I could edit the answer to include a disclaimer that while initially plausible, my identification is wrong and leave it there. I am tending to the idea that just deleting it is probably right.
As an additional factor, this was a Hot Network Questions question, so it is quite likely that the upvotes are not from dedicated members of the community, but from passers-by with affiliation bonus.