Apple watch connecting problem

Did she remove the watch from the old Apple ID.

There are things in this article she needed to do;

Before you sell your Watch... -

https://support.apple.com/en-us/HT208855

M1 Mac mini, macOS 11.3.1; Watch, series 5 GPS/cellular, watchOS 7.4.1; iPad Pro 2nd Gen, iPadOS 14.5.1; iPad Air 2, iPadOS 14.5.1; iPhone 12 Pro, iOS 14.5.1; TV 4th Gen, tvOS 14.5  HomePods, audioOS 14.5 and Airport Express w/ Airplay 2

Then she needs to follow these instructions;

Remove  Watch Activation Lock -

Go to icloud.com and login

Open Find iPhone.

In the All Devices pulldown menu select the Watch.

In the resulting sheet that appears to the right choose erase Apple Watch. Select Next until the device is erased.

Then Remove the watch from the Apple ID.

This should reset the watch to the factory settings to be set up as new and pair it to an iPhone.

I have given you all of the information that you need in my three posts.

Did you follow the steps that I outlined in my 2nd post for your sister's old Apple ID????

I'm done. I won't be responding to more.

Ciao

Set up your  Watch -

https://support.apple.com/en-us/HT204505

I can’t do you understand that when i want to set up the watch , the watch is asking for yhe old Apple ID