Unity Packages removed after incoming changeset

[nest]

Greetings.

We've moved to plastic SCM for our unity project version control recently, but I haven't used it extensively yet.

Today after opening my workspace, there were some incoming changes from my teammate.

After pulling/downloading the changes, lots of standard unity packages (like unity UI, that is installed by default) were removed from my local copy of the project.

My teammate did not delete any of the packages, and his changeset did not seem to have them deleted (though I have not looked carefully yet)

I also don't even know how could one delete those packages?

Right now I would like to revert this incoming changeset, is there a way to do that?

Your help would be appreciated.
Thanks.

 

[nest]

I think I managed to fix the issue, it was the manifest.json that was modified for some reason.