Unlock Apple Watch
Apple Watch is locked and I did not set up the Apple Watch
Apple Watch
Question marked as
Sounds like you do not recognise this other Apple ID? Did you just buy this Watch used? I suspect that the previous owner did not unlock it
Any Apple device with activation lock still applied is totally useless to the new owner unless the original owner can be contacted.
Further information can be found here
About Activation Lock on your Apple Watch - Apple Support