You mean like the last Peace deal in Istanbul, the one the Ukies and Russians agreed on a Peace deal? ….then Boris Johnson flew to Kiev and convinced Zelensky to trash it?
Wiki
After failing to blitz-takeover Kyiv and Kharkiv, taking heavy casualties and being forced to retreat off Kyiv oblast, Putin, as reported by the US magazine Foreign Affairs, was ready to put the status of Crimea up for discussion.[8][246][247]