Russia and Lufthansa have a fight but they dont even know why!

This was so strange. Lufthansa and the Russian Government are apparently having a fight. So much so that Russia has banned Lufthansa cargo flights from transiting Russian Airspace. But they dont even know why they are fighting!!!

Lufthansa has asked the government in Berlin to intercede in a dispute with
Russian authorities that has forced the German airline's cargo aircraft to avoid
Russian airspace since Sunday. Although the two sides yesterday could not even
agree on the cause of disruption to Lufthansa Cargo's vital Europe-to-Asia
flights, German observers spoke of yet another sign of a resurgent Russia.
Gerrit Wiesmann, Frankfurt

All this to be taken with a grain of piquant salt!!!