Mark as duplicate, original being deleted and unconsistent dialog showing
104285
Vanishing close-votes when the original version of a duplicate is deleted?
33449
Why does Stack Overflow allow duplicate display names?
36636
list management, deletion of duplicates
107358
Duplicated content - how to tell Google I am original author
140987
How to suppress a dialog box displayed by code that I can't change?
121334
Duplicate icons for manually created GNOME launcher items
8310
'Possible duplicate' comment not appearing for questions with deleted comments containing the link
16251
I accidentally marked the wrong question as a duplicate. How can I replace it with the correct duplicate?
105704
Question closed as duplicate with  and also shown as "Possible duplicate"
104937
How do I identify the process that owns a spurious dialog box?
11295
What is duplicate content and how can I avoid being penalized for it on my site?
29562
List.Add seems to be duplicating entries. What's wrong?
76831
Stack Exchange Inbox Items Duplicated (And Then Some)
29817
Closed as a duplicate, but the duplicate list is empty?
53802
How do I remove duplicate "Open With" context menu items in Finder.app?
101911
I do not get notified when the system adds a canned "possible duplicated" comment
24930
Auto comment "possible duplicate of ..." missing on voting to close as duplicate