Apple Watch Setup - Nike Run Club.

I recently upgraded from an iPhone 6+S to an iPhone 8.

My Apple Watch Series 3 was working perfectly with the old iPhone 6+S but since I have changed phone when I open the Nike Run Club app on my Apple Watch it gives me the following message “Apple Watch Setup - set up your Apple Watch from the Nike Run Club app on your iPhone”.

I then open the Nike Run Club app on my iPhone 8 and go to ‘Settings’. In the ‘Devices’ section there is an Apple Watch Setup option. I click on this and it gives green ticks for Location Services; Motion & Fitness; Notifications; and Health. It then gives an option to click ‘Next’.

When I do this is gives me an option to select the watch face metrics on the Apple Watch. I click on the one that I want and click ‘Done’.

It then brings me back to the ‘Settings’ page but still my Apple Watch gives me the message that I noted at the start asking me to set up the watch on my phone.

Can you please help? I would like to be able to continue running with the Apple Watch using the Nike Run Club app.