In the attached model, I had created sketch11 and sketch13 to create cut-loft2. I then wanted to create sketch15 to use as a relation for editing sketch13. I rolled back above cut-loft2 and created sketch15. When I roll forward to try and use sketch15 as a reference, sketch15 becomes suppressed and can't be used. Sketch15 is not, or should not be a child of either cut-loft2, sketch11, or sketch13. Why does it become suppressed?