They have just made a khichdi of all kalyug stories of Krishna. Bankey Bihari is a kalyug story. Then they added few stuff from Mirabai stories too. So basically they are trying to say that the old Krishna is gone due to Tulsi's curse but due to Radha's power of love, he returns to the world in his new form as Bankey Bihari.
Once again they fooled the teenage viewers with their fictional khichdi. πππ Now those nibbis will say Bankey Bihari statue in Vrindavan was built by Radha. πππ