Ukraine is in no need of further security guarantees from Western countries save the one guarantee that Russia will never accept: NATO membership. Without that – and the associated obligation to offer a direct military response to Russian aggression – it's difficult to see how any security guarantee could possibly extend beyond what Western countries are already providing.

Russia's key conditions for the supposed "deal" that you refer to were that (i) the size of the Ukrainian army would be heavily constrained and that (ii) Russia would have a veto on any response to future aggression against Ukraine. Ukraine rejected the deal because it would have been worthless.