Ticket #47750 - Creating a glue fails if one above level is a conflict or missing
    
    Description: This commit accidentally removed the code to add entry
    back to cache if it was replaced:
      Commit: 160cb3f686e433c01532d28770b2977ec957e73e
      Ticket #47750 - Creating a glue fails if one above level is a conflict or missing;
    
    Note: This is the cause of Ticket #47830 - usn tombstone entry not properly created