In a effort of cleaning up the vault, my work has adopted virtuallizing parts for those not included in the BoM.  This has not caused an issue till recently.  This assembly I am faced with has two virtual components that are being reflected in the vault tree.  I open the assembly and these are showing as virtual. 

  I have tried saving them out and revitualizing them.  I have checked for external references, and found none, but the parts are still showing in the vault and following the rev as the parent assembly is reved, so deleting or renaming them impacts my assembly.

  What can I do?  Any suggestions?