If a page named, say, Mangmangpo has to be moved back to the page Mangmang-Po, with a hyphen and capital P (which had once been moved to Mangmangpo), then it returns an error, since the original name (Mangmang-Po) is used already, and it redirects to the old name. Where the old name has to be reused, cutting and pasting is the only solution.
Thanks very much for the advice. Could you please help with my latest page move (from Star Sports 1 Kannada to Star Sports 3)? The Star Sports 3 name is being reused, and the page Star Sports 3 redirected to Star Sports 1 Hindi, which I fixed with a cut-and-paste. I have moved the content of Star Sports 1 Kannada to Star Sports 3. Can you kindly delete the page Star Sports 1 Kannada?