Just to clarify
@Grizzly toad ....
1) Were you selected in the 2022 DV Lottery that had results released in May 2021?
As in Do you already have a 1NL letter when you log in to the DV Status website and put in your details? The 1NL should have a date on it that is May 2021.
2) If you answer "yes" to the above:
Submit your DS260. It does not matter about your case number being current or not current.
3) If you answered "no" to (1):
Sounds like you are worrying about a problem you don't have yet. You weren't selected for 2022 DV lottery. Seneca said, and I paraphrase "you suffer more in imagination than in reality"
Sounds though that you are trying to best prepare yourself, just in case you get selected this year in May 2022 for the DV2023 lottery. That's good that you want to be prepared, but I would say, wait a month for the DV23 forum page to be created by the moderators and start discussing there with your cohort. The chances you get selected anyhow is small, I have friends who have submitted 9 years in a row and not gotten selected. So I wish you good luck and I hope you get it. (and if you do get selected... Submit your DS260 asap!!!!! Lol)
Edit: I just looked up
@Grizzly toad previous posts and user already has posted on the newly created DV23 forum page about not being selected yet in the DV lottery. In that case I refer you to Seneca. You're welcome to follow this forum post and read up previous posts, but please don't post here as it confuses people like me and we are at a different stage and DV lottery. Some of us, check this page every day for updates relevant to our consular processing stage (post in the DV23 forum instead please, enjoy).