How to change old design system to the new one

I have a file with a design system, and I want to preserve the properties of the components in Figma into new file and create new components in the design system with the same properties but with different tokens. Essentially, I need to detach the old components from the old design system into a new one. I need variants of the old components. May be we have some plugin? Or I can do it just in Figma?