Why would Peach color roses turn Pink?

My Peach color Roses have grown for 7 years in a raised bed along side a red American Beauty Rose. These two roses are the only things in this raised bed. The American Beauty Rose, Reds are perfect this year as always and smell wonderful. The Peach (another variety) turned to a boring Pink that has no scent at all, and isn't as large or as healthy as the original Peach Rose I planted there and that grew fine, for years. I used the same everything. The Pink one is just not attractive or large, nor does it have any fragrance at all. This never happened before. What causes this and why would this sudden change happen after all these years? I have pink Tea Roses but those are in another raised bed 15 feet away and can't touch. None of my other Roses changed colors or lost their scent. Thoughts? Only Rose growers please. .