Remove section from course after moving to a future plan

src/app/degree-planner/store/reducer.ts

@@ -346,7 +346,7 @@ export function degreePlannerReducer(
       const { yearCode: fromYearCode } = fromTermCode;
       const { yearCode: toYearCode } = toTermCode;
       const course = findCourse(state.visibleYears, fromTermCode, id);
-
+      this.course.classNumber = null;
       if (course && course.id !== null) {
         const fromYear = createYearWithoutCourse(
           fromTermCode,