As regular way I used to, I got interested in a question then I looked for duplicates. 2 other similar questions without answers. I've an answer so to post it, I had checked reputations, last login, acceptance ratio.. for all OP's. So I have chosen last asked one. All these is in aim to ensure getting a feedback for my answer.
After it was accepted, I flagged other questions as duplicate. Later, I just went back to one of the questions, here is:
Can boost 1.54 install with libboost_thread-mt.so like library files using apt-get install libboost-all-dev command [duplicate]
The duplicate note at the bottom in the flagged question says:
marked as duplicate by Sneetsher, Mitch♦ Jun 21 '14 at 8:40
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
OP commented on the question:
>this wasn't duplicate at the time I asked the question. Anyway I found the answer.
:) frustration feeling...no? As it seems to me that most OP's feel bad to ask a duplicated question.
The message suggests on OP to ask a new question. I think instead, it should suggests to edit same question as that what we want from OP to do in most cases.
OP will edit question to highlight differences with the pointed duplicate or mention that the answers there didn't work. Then his question will be reopened. So why it tells OP to ask a new question?
This question has been asked before. Well this is minor issue, the mentioned duplicate question may be asked after and it has got an answer.
Well, If the duplicate flag can be used on an old question which didn't get same attention (no answer) as the newer one. So the message would be better if it express both senses
May be difficult for me to express, Could duplicate note have the meaning of both of:
This question has been asked before and already has an answer.
This question has been asked after and already got an answer.
Or Do I have to answer the oldest question anyway?
This question already has an answer here: