Hello amtplskaart, I upgraded this highway to tertiary following the guidance provided by the Indonesian OSM wiki page (https://wiki.openstreetmap.org/wiki/Indonesian_Tagging_Guidelines#Roads).  Although this section of highway is narrow it provides connectivity to this secondary highway https://www.openstreetmap.org/way/319248834 and contributes access to the region of Puri Cendana, Indonesia(https://www.openstreetmap.org/node/11982910144). If you are familiar with this region and can confirm this highway is lower priority I will defer to your knowledge of the area, thank you and have a nice day. 