Anyone who knows the history of the relationships between Russia and all of its neighbors understands that no such terms can be accepted.
Russia did not grow to its huge size by being a nice neighbor.
For many centuries, the Russian Empire, then its successor, the Soviet Union, have continuously threatened their neighbors, issued ultimatums to them and launched unprovoked attacks against them.
Every time when Russia or the Soviet Union gave an ultimatum to some neighbor, there were plenty of voices that insisted that any Russian demands must be satisfied in order to not anger the great neighbor, so that Russia would not have reasons for further aggressive behavior.
Every time when these supposedly wise voices have been listened and the Russian demands have been accepted, that has only strengthened Russia and weakened the neighbor.
The consequences were always that later Russia came with even more shameless demands or it just attacked and occupied partially or totally the neighbor.
There is no indication that Putin will ever behave in a different manner than his ancestors, so there is no rational reason to believe that accepting any Russian demands can guarantee that they will stop at that, instead of demanding even more later.
For decades, or maybe centuries, there was a joke that circulated in all neighbor countries of Russia:
Where are the frontiers of Russia ?
Wherever they want ...