This was just posted on Lufthansa's website:
The flight currently operates a daily red-eye. Starting this winter, the Tuesdays and Friday services will be operated in the mornings instead.
The Tuesday and Friday morning flights will operate on A320-200s while the other days (the red-eye days) will operate on A321-200s
Honestly, what exactly is the benefit of doing this? Aren't connections better timed if the flights are all red-eyes?