I have two pages on my website one is called /iPhone-8/ and the other is called /iPhone-8-plus/. They're meant to rank for keywords: iPhone 8 and iPhone 8 Plus. When searching for "iPhone 8 Plus", it works perfectly fine and the site /iPhone-8-plus/ ranks high.

But now to the problem. When searching for "iPhone 8", the page /iPhone-8-plus/ appears and it ranks poorly. I would very much like /iPhone-8/ to rank for "iPhone 8 " searches.

In search console it says that its a double and that it is non-canonical.

Any of you have an idea of what to do?

Thanks in advance :-)