AR501

Hi, could someone please tell me why The Shuttleworth Spitfire, AR501, has had her Squadron Code changed from NN 310 (Czech) Squadron to DU 312 (Czech) Squadron?
is there any foreseeable plan to change the Code back to it’s original 1942/3 310 Squadron code? the NN code is significant to the Bedfordshire area as this was one of the original spitfire that escorted the US8AF 306th BG(H) on there very first mission of WWII, from their Station 111, Thurleigh, Bedfordshire in October 1942.