I just installed 0.15.9 headless on my server running debian 8. I followed othyns factorio headless guide on github and changed the url to the corresponding 0.15.9 download url. It took me about 2 hours to get the server up and running, but now I am stuck on loading a 0.15.9 savegame from my desktop.
When I try to start the server it shows the following error message: "Map version 0.15.9-0 cannot be loaded because it's higher than the game version" (screenshot attached)
It states that version 0.14.23 is installed, although I installed 0.15.9

Any idea why it won't run?
Thanks in advance!