iWatch won’t pair with iPhone 6+ Goes into IOS update loop.

Hi... I unpaired my iWatch a wee while back from my iPhone 6+

Due to unforeseen circumstances I am now having to pair it again, but when I “start pairing” on the iWatch and watch app, it tells me that my iPhone 6+ IOS is not up to date and to update it.

Then, when I go to update my iPhone 6+ IOS in “settings” it then tells me that my “IOS is up to date.”

When I try to pair the iWatch again it comes back with the same thing... my iPhone 6+ “IOS is not up to date”.

This happens whilst trying to do it via the phone camera/watch screen “automatic” process and whilst trying to do it via the “manual” process as well.

Can the code writers look into this bug please?

Thanks in advance.