I did the same thing on my 1st silver units when I began, unfortunately katie got the same fate also. I was able to recover fast since they were only silver units that can be quickly replaced. Now they are gone, used as AW fodder except for katie AW'ed n all that is still in my team not just to remind me of my noobness since Katie's role is just for quick deployment/retreat UP generator, It never really bothered me that much that she is broken.