Hi all, 
After running a macro on a part a feature was added in the tree. The macro swp file is now missing, actually I don't need it anymore. 

The problem is that now I cannot delete the feature or roll back the feature tree. So actually I cannot edit this part. 

Perhaps anyone knows how I can get rid of this? I'm hoping I wont have to re-model this part.
Please see attached images. 

Any help would be much appreciated! 
Thank you