Scene Changer: how to keep Scene Index consistent?

I started working with scene changer, which is a very useful for my project. However, after adding some new scenes, the Scene Index for the other scenes has changed. But the scene changes in my project are initiated with a little script inside each scene.

Now I have to edit all those scripts to change the index number for the next scene. As the project will gradually grow in the future, it won’t be the last time the index changes.

Is there a way to either keep the index for each scene consistent, or fetch the index number of the scene using the name of it in Python?