I recently posted this answer to a question marked as a duplicate. I did check first that my approach had not previously been taken. Should I delete my answer and transplant the analysis as an answer to the previous question?
Just as Xander Handerson wrote in this question comments
If you answer question then find out that it is a duplicate, but you feel that your answer has not been posted before, then please delete the original answer and repost it to the duplicate question.