thankfully here in the US, the warranty is not blanket voided if one does the service themselves. Best to keep receipts/photos of the service to substantiate that it was done.I don’t know if the KTM hotline is a worldwide service, but in the Netherlands if you miss one service at the dealer with a registration on ktm.dealer.net they won’t pick you up if your bike fails. Even when the millage is not reached you need at least one official service per year. Just to bare in mind when you reset the service indication.
I reset the indicator without issue.