I bought a Apple Watch from someone and I reset it and it’s asking me for there Apple ID

Click on this link to read "About Activation Lock on your Apple Watch" --> https://support.apple.com/HT205009

Get the other person to remove the lock, ask for a refund, or recycle the device.

Ask them to remove the lock or give you a refund. It's an anti-theft measure.

(197750)

The person that you bought this watch from needs to follow all the steps in this link;

Prepare the watch so the buyer can use it.

If they can't or won't then get your money back or recycle the watch and put it down to experience.