Delete one side of stereo track

I am new VideoStudio Ultimate 2023. Many years with Adobe PE. I am looking for a way to delete or shut off one of the stereo tracks and have the remaining track on both tracks. The reason being is that I record our church services with one channel of stereo coming from the audio mixer and the other a room mic as a backup incase nothing is coming from the mixer. So in post I will usually mute the room mic channel.