Hi osminng - Hope you are doing well. Some of your edits are creating duplicate ways. For example, https://www.openstreetmap.org/way/340181893 and https://www.openstreetmap.org/way/857933717. This returns a validation error in Josm "Duplicated Ways." Please take a closer look at some of your recent edits to make sure they are not creating these duplications. Happy mapping and have a great day.