Russia has been pursuing aggression towards non-aligned European states for a long time (including chemical weapon attacks) and no peace treaty has held. That's why many European countries aren't fond on a peace agreement between Ukraine and Russia with no kind of security guarantee, because they think it will just give Moscow time to rearm and repeat.

There's no reason to think another peace treaty as you're implying would make any difference. It's an unfortunate truth that the war ongoing in Ukraine is beneficial for European security, because it prevents Moscow re-arming and going for the Baltics, which is why European countries are happy to throw money at it.