diff --git a/litestar/_openapi/datastructures.py b/litestar/_openapi/datastructures.py
index d6a3bdf1d6..c11ad9997d 100644
--- a/litestar/_openapi/datastructures.py
+++ b/litestar/_openapi/datastructures.py
@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import weakref
 from collections import defaultdict
 from typing import TYPE_CHECKING, Iterator, Sequence, _GenericAlias  # type: ignore[attr-defined]
 
@@ -97,10 +96,7 @@ def __init__(self) -> None:
         self._schema_key_map: dict[tuple[str, ...], RegisteredSchema] = {}
         self._schema_reference_map: dict[int, RegisteredSchema] = {}
         self._model_name_groups: defaultdict[str, list[RegisteredSchema]] = defaultdict(list)
-        # no need to hold onto transient FieldDefinitions here so we're using weakrefs
-        self._component_type_map: weakref.WeakValueDictionary[tuple[str, ...], FieldDefinition] = (
-            weakref.WeakValueDictionary()
-        )
+        self._component_type_map: dict[str, FieldDefinition] = {}
 
     def get_schema_for_field_definition(self, field: FieldDefinition) -> Schema:
         """Get a registered schema by its key.
diff --git a/litestar/typing.py b/litestar/typing.py
index 5e2fe19a1d..4eb3bbe9cc 100644
--- a/litestar/typing.py
+++ b/litestar/typing.py
@@ -185,7 +185,6 @@ class FieldDefinition:
         "raw",
         "safe_generic_origin",
         "type_wrappers",
-        "__weakref__",
     )
 
     raw: Any
diff --git a/tests/unit/test_openapi/test_schema.py b/tests/unit/test_openapi/test_schema.py
index 05c77cd36d..daa57ad4c0 100644
--- a/tests/unit/test_openapi/test_schema.py
+++ b/tests/unit/test_openapi/test_schema.py
@@ -97,11 +97,11 @@ class Data:
     @post("/")
     def handler(
         data: Data,
-    ) -> Annotated[Data, Parameter(component_key="not_data")]:
+    ) -> Annotated[Data, Parameter(schema_component_key="not_data")]:
         return Data()
 
     @get("/")
-    def handler_2() -> Annotated[Data, Parameter(component_key="not_data")]:
+    def handler_2() -> Annotated[Data, Parameter(schema_component_key="not_data")]:
         return Data()
 
     app = Litestar([handler, handler_2])
@@ -142,11 +142,11 @@ class Data2:
     @post("/")
     def handler(
         data: Data,
-    ) -> Annotated[Data, Parameter(component_key="not_data")]:
+    ) -> Annotated[Data, Parameter(schema_component_key="not_data")]:
         return Data()
 
     @get("/")
-    def handler_2() -> Annotated[Data2, Parameter(component_key="not_data")]:
+    def handler_2() -> Annotated[Data2, Parameter(schema_component_key="not_data")]:
         return Data2()
 
     with pytest.raises(ImproperlyConfiguredException, match="Schema component keys must be unique"):