Stack Exchange Network
Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Visit Stack Exchange
This is by design.
From the help center article Why are some questions marked as duplicate?
The original question must have an answer; you cannot mark a question as a duplicate of an unanswered one.
The rationale is that two questions could be worded very differently, and they should really only be marked as duplicates if the answer (or answers) to one also directly answers the other.
answered Mar 15, 2018 at 4:12
Niall C.ModNiall C.
7,19911 gold badge1313 silver badges2323 bronze badges
You must log in to answer this question.
Not the answer you're looking for? Browse other questions tagged