Video editing in lightroom classic

I am hoping to edit my videos in Lightroom Classic but I have an issue that I cannot seem to find an answer for.  I edited a still photo from my video and then used the sync the settings option to add them to the video.  How do I undo that sync if I don't like my changes?  I would like to get back to the original video and try some different changes.  Is this possible or do I have to reload my original video from my computer?

Thanks.

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