I hope this offer is not real. If it is Ukraine should be biting the hand of Russia to take that deal.humiliating defeat if true
An independent Ukraine now will have billions of dollars of NATO military equipment poured into it. Within a few years Ukraine will be at the point where it can fight a future Russian invasion independently. With the same institutions in place we'll be back in the same situation except the only card Russia will be left to play with is the nuclear one.
There's no going back at this point and there should only be one winner in this fight, Russia or Ukraine.
I hope Putin recognises this and this offer is just negotiating mind games to give the Russian military more time.