1. Take the backup of your existing WFA2.2. If you are planning to install WFA3.1P2 on a different windows box( other than where the original wfa2.2 was present) , then you need to take the wfa key from the existing wfa. How to take this key? See installation and setup Guide. its simple 1 line CLI step
2. Install WFA3.1P2 freshly.
3. Restore the backup obtained in step(1). Restore the key as well if it was required.
No need for any intermediate WFA installations.
If this post resolved your issue, help others by selecting ACCEPT AS SOLUTION or adding a KUDO.