Archaeological question. When looking for the oldest question on Meta, I found that
None of the answers I see has a post number of 5, which means that that answer was deleted. But how is it possible that the answer has a lower post ID than the question?
At first I thought that the asker might have answered the question when posting it (using the "Answer your own question" checkbox), but I tried that and the answer is assigned ID questionID + 1. So that can't be why.
Similar: Back to the future (but not the same issue, since in that case the post IDs are in the expected order).