When I set structured repeats for any given workout, then I hit on "Do workout" the previous repeats load in the workout.
I.E.:
Yesterday 5 x 1km x 2' rest
I create a new workout with 5 x 5km x 2' rest and hit on 'Do workout' the previous one loads for my session.
Workaround: Start the workout with the wrong settings -> discard -> start a new one with the real interval training.