Update a New Script Version in Scene

Hello,

I have a main controller Script in my project.

In scene it is linked with many UI elements and other UnityEvent objects that call functions in the Script.

Now I must modify core functionality in the Script for incoming new scenes, but I'd like mantain original functionality in last scenes. Is there any way where I could create new version of the Script (with new functionality, and some name variation) in new version of the scene (with the same elements linked to the Script)?

So I need:

• Last Scenes using the last version of the Script

• New Scenes using the new version of the Script, but without the needed to relink all the in-scene elements manually

Thanks for your help