If I already have an Apple Watch do I have to unpair it before I can pair new watch
If I already have an Apple Watch paired do I have to unpair before I can pair new Apple Watch
No, just follow the steps listed inSet up your Apple Watch.
After verifying that the new watch is working as expected, you may also want to consult "What to do before you sell, give away, or trade in your Apple Watch, or buy one from someone else."