Unity scene overwritten?

I was working in my project, and downloaded a unity-package file which contained some stuff I wanted to implement. Included was a scene that demonstrated some stuff.
Then I clicked “new scene” in my project (in order not to somehow overwrite the current scene), I saved the current scene at that point.
Then I imported the unity-package file, I looked around in the scene for a bit. Then I went to “file>open scene” and located my scene.unity file. I opened it, and wahey, I was looking at the same scene I found in the unity-package.

So let me get this straight: importing a unity-package file will overwrite any files in your current project, without giving you a heads-up?

I understand. I did get the popup showing me the hierarchy. However - I did not get any notification that I already had a file named ‘scene.unity’ in my hierarchy.

Am I correct to understand there’s only the check boxes, and the user is expected to cross-check all the imported files manually to see if there’s a chance for them to overwrite something? No additional pop-up warning you, in case you didn’t know all the file names in your current scene from the top of your head?

when importing assets from a package I believe you get a popup that shows the contents in a large hierachy. Each items path and name is show along with a checkbox. If you just igored this list and clicked import, well… should Unity ask you once more?

If that dialog didnt appear, I think you might have found a bug.