Question Public Variables Stored in Prefab are Lost When Moved to Another Project

I hope I can describe this clear enough

So I have these public variables in my script


In my prefab, I added an empty object and set up the script like so


After I copy my asset folder (including these script, prefab and meta files) to another project, I can still see these settings in prefab, but it disappear when I drag n drop it in the scene:


Is this normal?

 

After some recopying for a couple of time, the problem is fixed.
Still, I have no idea why the setting of the script will be changed after dragging prefab into the scene