Lancia Musa inspection intervals

Hello all, we have a Lancia Musa 1.3 Diesel 90 HP and are super satisfied with it. Now he has the first year (10,000 km) on the “Buckel and it poses to us the following question: In the manual it says that he needs every 20Tkm an inspection, or but 1 x a year… What if we would actually give him after 20 Tkm for inspection, would the warranty or factory guarantee be omitted?? For your answers already in advance thank you! Rioabajorio