diff --git a/src/memos/api/handlers/memory_handler.py b/src/memos/api/handlers/memory_handler.py
index 689e2b16b..f0f3f39b9 100644
--- a/src/memos/api/handlers/memory_handler.py
+++ b/src/memos/api/handlers/memory_handler.py
@@ -15,6 +15,7 @@
     MemoryResponse,
 )
 from memos.log import get_logger
+from memos.mem_cube.navie import NaiveMemCube
 from memos.mem_os.utils.format_utils import (
     convert_graph_to_tree_forworkmem,
     ensure_unique_tree_ids,
@@ -162,11 +163,13 @@ def handle_get_subgraph(
         raise
 
 
-def handle_get_memories(get_mem_req: GetMemoryRequest, naive_mem_cube: Any) -> GetMemoryResponse:
+def handle_get_memories(
+    get_mem_req: GetMemoryRequest, naive_mem_cube: NaiveMemCube
+) -> GetMemoryResponse:
     # TODO: Implement get memory with filter
     memories = naive_mem_cube.text_mem.get_all(user_name=get_mem_req.mem_cube_id)["nodes"]
     preferences: list[TextualMemoryItem] = []
-    if get_mem_req.include_preference:
+    if get_mem_req.include_preference and naive_mem_cube.pref_mem is not None:
         filter_params: dict[str, Any] = {}
         if get_mem_req.user_id is not None:
             filter_params["user_id"] = get_mem_req.user_id
@@ -183,10 +186,11 @@ def handle_get_memories(get_mem_req: GetMemoryRequest, naive_mem_cube: Any) -> G
     )
 
 
-def handle_delete_memories(delete_mem_req: DeleteMemoryRequest, naive_mem_cube: Any):
+def handle_delete_memories(delete_mem_req: DeleteMemoryRequest, naive_mem_cube: NaiveMemCube):
     try:
         naive_mem_cube.text_mem.delete(delete_mem_req.memory_ids)
-        naive_mem_cube.pref_mem.delete(delete_mem_req.memory_ids)
+        if naive_mem_cube.pref_mem is not None:
+            naive_mem_cube.pref_mem.delete(delete_mem_req.memory_ids)
     except Exception as e:
         logger.error(f"Failed to delete memories: {e}", exc_info=True)
         return DeleteMemoryResponse(
diff --git a/src/memos/memories/textual/prefer_text_memory/extractor.py b/src/memos/memories/textual/prefer_text_memory/extractor.py
index 72daa31cd..f23135754 100644
--- a/src/memos/memories/textual/prefer_text_memory/extractor.py
+++ b/src/memos/memories/textual/prefer_text_memory/extractor.py
@@ -114,10 +114,7 @@ def _process_single_chunk_explicit(
                 "embedding": self.embedder.embed([pref["context_summary"]])[0],
             }
 
-            inner_keys = set(PreferenceTextualMemoryMetadata.model_fields.keys())
-            inner_info = {k: v for k, v in info.items() if k in inner_keys}
-            user_info = {k: v for k, v in info.items() if k not in inner_keys}
-            extract_info = {**basic_info, **pref, **vector_info, **inner_info, "info": user_info}
+            extract_info = {**basic_info, **pref, **vector_info, **info}
 
             metadata = PreferenceTextualMemoryMetadata(
                 type=msg_type, preference_type="explicit_preference", **extract_info
@@ -144,16 +141,7 @@ def _process_single_chunk_implicit(
             "embedding": self.embedder.embed([implicit_pref["context_summary"]])[0],
         }
 
-        inner_keys = set(PreferenceTextualMemoryMetadata.model_fields.keys())
-        inner_info = {k: v for k, v in info.items() if k in inner_keys}
-        user_info = {k: v for k, v in info.items() if k not in inner_keys}
-        extract_info = {
-            **basic_info,
-            **implicit_pref,
-            **vector_info,
-            **inner_info,
-            "info": user_info,
-        }
+        extract_info = {**basic_info, **implicit_pref, **vector_info, **info}
 
         metadata = PreferenceTextualMemoryMetadata(
             type=msg_type, preference_type="implicit_preference", **extract_info