With respect to how Ukraine yielded up nukes while Russia gave "assurances" that they would respect Ukrainian borders [0], Putin has claimed it doesn't count now because it's a different Ukraine.

If that's really how he feels, then it's time to expel the imposter "Russia" that's been falsely posing as a member of the United Nations Security Council, because it's not reeealy the USSR...

[0] https://en.wikipedia.org/wiki/Budapest_Memorandum