diff --git a/graphene_pydantic/inputobjecttype.py b/graphene_pydantic/inputobjecttype.py
index 95f444d..c7d8a5e 100644
--- a/graphene_pydantic/inputobjecttype.py
+++ b/graphene_pydantic/inputobjecttype.py
@@ -149,8 +149,6 @@ def resolve_placeholders(cls):
                     model=target_type.model,
                 )
                 fields_to_update[name] = graphene_field
-                meta.registry.register_object_field(
-                    cls, name, pydantic_field, model=target_type.model
-                )
+                meta.registry.register_object_field(cls, name, pydantic_field)
         # update the graphene side of things
         meta.fields.update(fields_to_update)
diff --git a/tests/test_registry.py b/tests/test_registry.py
index b8c875f..77ee7d7 100644
--- a/tests/test_registry.py
+++ b/tests/test_registry.py
@@ -58,3 +58,20 @@ def test_register_object_field_and_get_for_graphene_field():
     field = r.get_object_field_for_graphene_field(GraphFoo, "name")
     assert field is not None
     assert field.annotation == str
+
+
+def test_register_object_field_nested_model():
+    """https://github.com/graphql-python/graphene-pydantic/issues/104"""
+
+    class A(BaseModel):
+        x: str | None = None
+        y: list["A"] | None = None
+
+    class P_A(PydanticInputObjectType):
+        class Meta:
+            model = A
+
+    try:
+        P_A.resolve_placeholders()
+    except TypeError as e:
+        assert False, f"'10 / 5' raised an exception: {e}"