I don’t know the Apple ID connected to this Apple Watch
I don’t know the Apple ID that was used for this Apple Watch
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If you are the original owner then;
You can ask apple to remove the activation lock online on this page;
Remove the Activation Lock Here.
Or this;
If you can't remember/gain access to the apple id that paired the watch to the phone.Take the watch and it's receipt with the serial number along with some photo id and any other proof of ownership to an Apple Store and request that they remove the Activation Lock for you.