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;
    Thanks to lkrispen@redhat.com for figuring it out.
    
    Note: This is the cause of Ticket #47830 - usn tombstone entry not properly created
    (cherry picked from commit 98cf4246b6e5c8a99a1e9063eca9aad9560185bd)
    (cherry picked from commit 8c496b1e3b9d8a23369573423cb0b22bc6ed0e2d)
    (cherry picked from commit 51a76a4d565f0e93092e589ee7e3064d5371c54a)