Overall, I think there's been substantial doctoring to make this "look" like a WW1 image but I think it's much more modern.
According to wikipedia, yup, not the most reliable, but its source material is, Paul Leaman's book on Dr Is:
"Three triplanes are known to have survived the Armistice. Serial 528/17 was retained as a testbed by the
Deutschen Versuchsanstalt für Luftfahrt (German Aviation Research Institute) at Adlershof. After being used in the filming of two movies, 528/17 is believed to have crashed sometime in the late 1930s.
[37] Serial 152/17, in which
Manfred von Richthofen obtained three victories, was displayed at the
Zeughaus museum in Berlin.
[37] This aircraft was destroyed in an Allied bombing raid during
World War II.
In 1932, Fokker assembled a Dr.I from existing components. It was displayed in the
Deutsche Luftfahrt-Sammlung in Berlin. In 1943, the aircraft was destroyed in an Allied bombing raid. Today, only a few original Dr.I artifacts survive in museums."
It's possibly one of these aircraft? The marking on the side doesn't resemble anything Richthofen put on his aircraft. The Sammlung Dr I was painted as Richthofen's 425/17, his all-red aircraft he was shot down in and as was typical of aircraft displayed in the big museum it had an inscription on the side of it.