I just answered a question and then another SE user pointed out it was a duplicate. Not only was the question asking about almost the same topic, but question body was literally copy/pasted. Usually, I wouldn't support such a question and immediately point out to OP to go read the other one and stop doing such things.
However, in this specific case, I took the time to write a relatively lengthy and maybe even helpful answer. Would be a shame for that answer to go to waste. At the same time, I have an ingrained distaste for copy/pasting, so I don't know if I should repost my answer in the proper place now.
Should I copy the answer over? Should I copy it over and then delete it from duplicate post? Or should I just let it be where it is and move on?