diff --git a/lib/galaxy/managers/tags.py b/lib/galaxy/managers/tags.py
index 0421e826d1c..6f059f49014 100644
--- a/lib/galaxy/managers/tags.py
+++ b/lib/galaxy/managers/tags.py
@@ -46,7 +46,7 @@ class TagsManager:
 
     def update(self, trans: ProvidesUserContext, payload: ItemTagsPayload) -> None:
         """Apply a new set of tags to an item; previous tags are deleted."""
-        tag_handler = GalaxyTagHandlerSession(trans.app.model.session)
+        tag_handler = GalaxyTagHandlerSession(trans.sa_session)
         new_tags: Optional[str] = None
         if payload.item_tags and len(payload.item_tags) > 0:
             new_tags = ",".join(payload.item_tags)
@@ -60,7 +60,7 @@ class TagsManager:
         """
         Get an item based on type and id.
         """
-        tag_handler = GalaxyTagHandlerSession(trans.app.model.session)
+        tag_handler = GalaxyTagHandlerSession(trans.sa_session)
         id = trans.security.decode_id(payload.item_id)
         item_class = tag_handler.item_tag_assoc_info[payload.item_class].item_class
         item = trans.sa_session.query(item_class).filter(item_class.id == id).first()