Morning Alan,
GMI3597 has indeed landed in EDDL. The flight before, GMI3596 from EGKK to ENTC, wasn't on thwe tables either.
I don't think, that Germania is performing one postitioning flight after the other. Maybe time will tell if these are recurring flights or not.
After Niklas and John I'm quite curious who I am next for you ;-)
Ingo