I see no reason you need to delete or redo anything. Options that could work:
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Use the new Annotation function with “Time Off” option that will effectively empty the timeframe you set in the “Schedule” section. This will trigger a recalculation of your Plan Builder to empty that time and adjust pending workouts and training phases as appropriate.
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Simply perform your rides as desired and ignore the current plan. You can leave the scheduled workouts as “skipped” or possibly associate them to a ride on the same day. I’m not sure it really matters which you do, since AT would see them all as missed workouts.