A question can be a duplicate of more than one question. Moderators and users with gold tag badges can add questions to the list of questions that a given question is a duplicate of. I was recently closing a question as a duplicate and I saw a lot of similar questions. This led me to wonder: Is there any limit to how many questions I can add to the list? Can I just keep on adding more questions forever, or will the system stop me at some point?

  • This seems to imply 3 but it's not clearly and boldly written, 3 is the most I've seen. – Rob Jan 5 '20 at 22:32
  • @Rob There was one with four targets that got deleted today. – Sonic the Curiouser Hedgehog Jan 5 '20 at 22:56
  • @SonictheAnonymousHedgehog Can you find one with more, give us a FAQ link, or edit the Sandbox question to see how many you can stuff in there. – Rob Jan 5 '20 at 22:59
  • 1
    @Rob Don't have a gold badge. 10k+ users can see an example here, and I've pinged someone who probably knows more about it. – Sonic the Curiouser Hedgehog Jan 5 '20 at 23:00

Apparently I should have just tried this before asking. The "add" button is no longer clickable (it is faded out) once there are five questions in the list:

Screenshot showing ability to add when there are only four questions

Screenshot showing the inability to add when there are five questions


Can't find an official post on this, but the highest amount of dupe-targets I've encountered is five. I wrote a quick SEDE query sorting the posts by number of dupe targets coming from it, and this seems to confirm that "five" assumption.

  pl.PostId AS [Post Link],
  COUNT(LinkTypeId) AS 'Number of dupe-targets'

FROM PostLinks pl

WHERE pl.LinkTypeId=3 

GROUP BY pl.PostId

ORDER BY 'Number of dupe-targets' DESC

screenshot of results

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