Hi, this is probably due to Free Route Airspace Implementation by Austria and Slovenia:   https://www.austrocontrol.at/jart/prj3/austro_control/data/dokumente/Ep69G_LO_Circ_2016_A_06_en.pdf   Until 2022 all upper airways will be gone in whole Europe:   https://ec.europa.eu/transport/modes/air/ses/ses-award/projects/hufra_en