I came across a question[duplicate] today on this site which has already been asked on StackOverflow. I wanted to mark it as duplicate but I was not able to do so because when I pasted the link to the original question from StackOverflow, a message said that the question had to be in webmasters.stackexchange.com.
My question is:
Is there another way to mark such questions as duplicate? If not, how do we deal with these scenarios?
I pasted the link to the original question, as the answer to the question[duplicate] asked on this website because I wanted the guy to find that answer ASAP. Is it wrong to do that?