Prevent duplicate-question link rot
74028
"Duplicate of...[deleted post]"
133576
Should we reword the closure text for duplicate questions?
64472
Manual "Possible duplicate of" comments are wrongly removed when question is closed
78861
Why are there two separate boxes about duplicate questions?
11295
What is duplicate content and how can I avoid being penalized for it on my site?
89289
Show unanswered questions in the duplicate dialog on meta sites and in other cases where choosing an unanswered target is allowed
82853
Can Community ♦ raise a duplicate content flag when an answer is deleted and re-posted as a new answer?
1663
Allow same user to add multiple links as possible duplicates
149990
Preventing misuse of question self-deletion
18551
Duplicate questions in feed, and questions incorrectly marked as unanswered
16883
Links to answers are not formatted to show the title automatically
139852
Dealing with suggested edits on question to be closed as duplicate
12566
Give an incentive for finding duplicate questions
114583
Should users be allowed to remove the "Possible Duplicate" links on closed questions?
62261
Browsing Questions shows the same questions on different pages
108725
Alignment issue for the last modified information in the "Top Questions" page
133624
Replacement character being used question URL