Un-Recommending A Piece

I've accidentally recommended a piece for radio twice now. Is there any way to retract a recommendation? I was trying to click the score and I accidentally recommended the piece.

The placing of the radio recommendation is indeed on the same spot as the score button, when the actual score is not provided. I have recomended some works by accident. You can un-recommend it by clicking again, the original green add-button has been replaced by a red remove-button.