Complex sentence: Leave the article in the condition it was in before the Bold edit was made (often called the "status quo ante") or, when the discussion has achieved mutual understanding, attempt that may be acceptable to all participants in the discussion.
Split into simpler sentences: Leave the article in the condition it was in before the Bold edit was made (often called the "status quo ante"). When the discussion has achieved mutual understanding, attempt a new edit that will be acceptable to all participants in the discussion.