title: Model stuck to target in StoryBoard Scene
body: <p>I have a could of scenes in my storyboards whose modules remain locked to a single target - if I try to delete the module and then click in some other field, a module is atomically written - with the result that, when I run a different target I have a crash while trying to open that ViewController.
  I tried deleting the <em>customModule</em> field in the storyboard source but in so doing all targets start to crash.
  All the other scenes normally have None instead of a specific module and thereafter work with any target.</p>
  
  <p>What may be the business, and how to fix it without having the switch module each time I compile for a different target?</p>