Yamaha CLP 110 G key sticks sometimes

I have a Yamaha CLP 110 Clavinova that has served me well. The G key in the same octave as middle C sticks sometimes. Do I need to try to replace that key? If so what part do I order?

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and it’s ONLY when played in the octave context.

…seems like this Forums app lost most of my explanation… in short, I have a B-key just below Middle-C that sticks – ONLY in 1 particular piece.

The key is most likely cracked at the back and needs to be replaced. Part # VU101402