diff --git a/reasoner_pydantic/base_model.py b/reasoner_pydantic/base_model.py
index dad0e81..ed8ea6d 100644
--- a/reasoner_pydantic/base_model.py
+++ b/reasoner_pydantic/base_model.py
@@ -27,6 +27,9 @@ def update(self, other):
             f"Model {self.__class__.__name__} has no update method"
         )
 
+    def get_field(self, field):
+        getattr(self, field, None)
+
     # After running validation on all known properties, make sure everything else is hashable
     @root_validator(allow_reuse=True, pre=False)
     def make_hashable_root(cls, values):
diff --git a/reasoner_pydantic/kgraph.py b/reasoner_pydantic/kgraph.py
index 0f9a8f0..286cf4b 100644
--- a/reasoner_pydantic/kgraph.py
+++ b/reasoner_pydantic/kgraph.py
@@ -103,7 +103,15 @@ class Config:
     def update(self, other):
         if other.attributes:
             if self.attributes:
-                self.attributes.update(other.attributes)
+                # We need to make sure we don't add a second KL/AT
+                new_attributes = HashableSet[Attribute]
+                for attribute in other.attributes:
+                    if attribute.attribute_type_id not in (
+                        "biolink:knowledge_level",
+                        "biolink:agent_type",
+                    ):
+                        new_attributes.add(attribute)
+                self.attributes.update(new_attributes)
             else:
                 self.attributes = other.attributes
         if other.sources:
diff --git a/setup.py b/setup.py
index 9fb04a1..fa7eb62 100644
--- a/setup.py
+++ b/setup.py
@@ -9,7 +9,7 @@
 
 setup(
     name="reasoner-pydantic",
-    version="5.0.4",
+    version="5.0.5",
     author="Abrar Mesbah",
     author_email="amesbah@covar.com",
     url="https://github.com/TranslatorSRI/reasoner-pydantic",