Why can't I delete a post I made?

Question

I posted a question a couple years ago. It did not receive any answers for several days, at which point I decided to do my own research for a second time to see if I missed something, and found the answer to it, so I answered my own question. Since then, the only activity on the post has been a lot of downvotes (not entirely sure why it keeps getting downvoted, but I don't really care), which keep costing me reputation. I tried to delete the post because after several updates to the game, it is now outdated. It wouldn't let me delete it, instead it asked if I wanted to recommend a community vote to delete it. I tried deleting the answer, too, with the same results. Any idea why this happened?

Answer 1

Presumably, based on Memor-X's comment, because you have accepted an answer.

i see a non-deleted, downvoted answer which has been accepted. doesn't the accepted answer prevent deleting?

From the FAQ, How does deleting work? What can cause a post to be deleted, and what does that actually mean? What are the criteria for deletion?

When can't I delete my own post?

Special note: You can't delete your own post using the iOS or Android apps. You can, however, delete your post by using the app's option to open the question in a Web browser and deleting it from there, provided none of the below apply.

You can't delete your own answer if it has been accepted.

You can't delete your own question if it:

• has an answer with upvotes (even if that answer has a net zero or negative score)
• has an accepted answer
• has multiple answers (even if there are no upvotes)
• has an answer with an awarded bounty

You can't delete any of your questions or answers if you haven't registered your account (that is, associated a Google, Facebook, or Stack Exchange account with it).