You have good roots - but one branch grew wrong. That's alright. Do not worry yourself about it. It happens to us all, quite regularly. God loves our growth. If we never grew, He would never need to prune. And He must prune if we are to continue to grow and bear more fruit.
So let Him do it, even when it's painful. Let Him lop it off! Be glad that branch grew out - whether it was bad, dead, unfruitful, or even sickly - be thankful that it grew enough for Him to cut it. Oh, happy day, when you see next season's fruit!
Photograph: tree, unknown