Maybe the better question is, what were the changes in the CFA exam compared to the previous year? I would guess you can probably use the one from previous year but do your own due diligence by referring to CFA Institute website and searching for changes.
Better yet, someone who has already looked into it can give some feedback.
For level 1 in particular I wouldn’t be too worried about using a prior years version. There are so many questions, if you miss a couple cause of lack of coverage you’ll still be fine. I used a year old version to study when I wrote level 1 and passed no issue.