diff --git a/lib/galaxy/model/__init__.py b/lib/galaxy/model/__init__.py
index 78b67b4a1e1..edb7cc88868 100644
--- a/lib/galaxy/model/__init__.py
+++ b/lib/galaxy/model/__init__.py
@@ -3608,12 +3608,15 @@ class LibraryDatasetDatasetAssociation(DatasetInstance, HasName, RepresentById):
                 select library_folder.parent_id from library_folder, parent_folders_of
                 where library_folder.id = parent_folders_of.folder_id
             )
-            update library_folder 
-            set update_time = (select update_time from library_dataset_dataset_association where id = :ldda_id)
+            update library_folder set update_time =
+                (select update_time from library_dataset_dataset_association where id = :ldda_id)
             from parent_folders_of
             where library_folder.id = parent_folders_of.folder_id
         ''')
-        db_session.execute(sql, {'library_dataset_id': ldda.library_dataset_id, 'ldda_id': ldda.id})
+        log.debug('Updating parent folder update_time: {0} {1} {2}'.format(sql,ldda.library_dataset_id,ldda.id))
+        ret = db_session.execute(sql, {'library_dataset_id': ldda.library_dataset_id, 'ldda_id': ldda.id})
+        log.debug('execute returns: {0}'.format(ret.rowcount))
+        db_session.flush()
 
 class ExtendedMetadata(RepresentById):
     def __init__(self, data):