title: Xcode modifies current CoreData model version at every launch
body: <p>I'm using Xcode 4.6 to work on a project which uses CoreData. The data model is now at version 13 and uses lightweight migration.</p>
  
  <p>My problem: At every launch Xcode seems to modify the PROJECT.xcdatamodeld/.xccurrentversion file to be set to version 1. I noticed that the modified file is automatically added to the GIT index. The changes made to this file are NOT reflected by the GUI of Xcode which tells me that my model's current version is 13. This problem started at some point during the development process (maybe at model version 7) and persists even for new model versions. The strange thing about it that even different Xcode installations on different computers show this behavior for this project. I included a screenshot of the changes made to the file.</p>
  
  <p>My workaround is to reset the changes to this file at every launch of Xcode using GIT but it's very annoying. Someone got an idea how to solve this? Seems like a bug in Xcode.</p>
  
  <p><img src="https://i.stack.imgur.com/z1v9r.png" alt="Changes made to the .xccurrentversion file at every launch"></p>