Originally Posted by Hypoxia
Deleting the old ones kills their comments, and I treasure comments. What I did in a somewhat similar situation was write and post the new version with an Author's Note explaining the development and pointing to the original, and an Author's Comment on the original pointing to my new version.
When I posted one of my stories it was a mess. I was trying to finish it in a hurry with family matters intruding on my writing time.
Later, after several helpful comments pointing out some of the flaws, I was able to edit it into reasonable shape. I deleted all the comments about the errors but left a comment of my own to explain what I had done and why. Valid criticism can be very useful.
PS - but I had a comment this year from an anonymous grammar nazi complaining that I changed tenses in subsequent paragraphs. If it had been true the comment would be useful. Unfortunately that anon didn't recognise the difference between present continuous and present simple e.g. Jane is tall and slim. She was tall and slim when the story started. She's still tall and slim when the story ends three months later. Anon thought I should have written 'Jane WAS tall and slim' when telling the story about Jane...