Don't allow the target of a duplicate question to be deleted
106883
Auto-flag duplicates of deleted questions for reopening / deletion
9251
Do you delete your own answer when it's a duplicate?
114583
Should users be allowed to remove the "Possible Duplicate" links on closed questions?
51805
"Delete this answered question?" when the only answer is deleted
32895
How can I avoid asking duplicate questions?
124652
Can I prevent others from editing my question?
47476
Is it possible to exclude questions I've already answered from the search criteria?
46526
Duplicate question etiquette: to delete or not to delete?
103021
Don't close questions where the user has requested that it not be closed
82521
Prevent protecting questions under certain circumstances
133887
Are questions closed as duplicates ever automatically deleted?
146785
How should we handle a question which was deleted and reasked?
123324
Duplicate dialog breaks when the identified duplicate is deleted
139852
Dealing with suggested edits on question to be closed as duplicate
134240
Deleting self-answered question gets "Delete this answered question" warning
78861
Why are there two separate boxes about duplicate questions?
119857
Could we allow child Meta questions to be closed as duplicates of Meta.SE ones?