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Codidact Meta is the meta-discussion site for the Codidact community network and the Codidact software. Whether you have bug reports or feature requests, support questions or rule discussions that touch the whole network – this is the site for you.
It is possible to close a question as duplicate to itself.
I wanted to close one of my own meta posts as duplicate, but accidentally pasted the URL to the question I was closing. The site accepted that the post got closed as duplicate to itself.
In my opinion, this shouldn't be allowed, since it doesn't make any sense.