Thing is mate it’s a minor detail, so I wouldn’t worry.
Just sign a printout pointing out it was a complete genuine miscalculation and a mistake…job done.
If you had gone way over your driving time or way under your rest period or something serious, then ok it’s something to worry about in terms of maybe getting fined out of your hard earned.
Thing is this is exactly what ‘‘They’’ want, drivers biting their nails and ■■■■■■■■ their kecks over trivialities connected to tachos and driver’s hours, way I see it is if you show any degree of concern it just encourages them.
That is why on the seldom occasions I get a minor infringement I just sign the ■■■■ thing, saying ‘‘Aye whatever, give me a good seeing to’’ or something similar in my best ‘‘could not give a ■■■■’’ attitude… and it annoys ‘‘them’’ which is the desired effect. 