diff --git a/apps/enm/serializers.py b/apps/enm/serializers.py
index 5bc9a98b..576cbddf 100644
--- a/apps/enm/serializers.py
+++ b/apps/enm/serializers.py
@@ -25,10 +25,20 @@ class MpointSerializer(CustomModelSerializer):
         read_only_fields = EXCLUDE_FIELDS + ["belong_dept", "cate"]
 
     def get_last_data(self, obj):
-        return cache.get(Mpoint.cache_key(obj.code), {}).get('last_data', {})
+        cache_mp = cache.get(Mpoint.cache_key(obj.code))
+        if isinstance(cache_mp, dict):
+            last_data = cache_mp.get('last_data', {})
+        else:
+            last_data = {}
+        return last_data
     
     def get_gather_state(self, obj):
-        return cache.get(Mpoint.cache_key(obj.code), {}).get('gather_state', -2)
+        cache_mp = cache.get(Mpoint.cache_key(obj.code))
+        if isinstance(cache_mp, dict):
+            gather_state = cache_mp.get('gather_state', -2)
+        else:
+            gather_state = -2
+        return gather_state
 
     def validate(self, attrs):
         if "material" in attrs and attrs["material"]: