diff --git a/backend/appsettings/index_mapping.json b/backend/appsettings/index_mapping.json
index 3d0d3ad8..16bfea93 100644
--- a/backend/appsettings/index_mapping.json
+++ b/backend/appsettings/index_mapping.json
@@ -606,22 +606,6 @@
         {
             "index_name": "subtitle",
             "expected_map": {
-                "youtube_id": {
-                    "type": "keyword"
-                },
-                "title": {
-                    "type": "text",
-                    "fields": {
-                        "keyword": {
-                            "type": "keyword",
-                            "ignore_above": 256,
-                            "normalizer": "to_lower"
-                        }
-                    }
-                },
-                "subtitle_fragment_id": {
-                    "type": "keyword"
-                },
                 "subtitle_channel": {
                     "type": "text",
                     "fields": {
@@ -635,15 +619,11 @@
                 "subtitle_channel_id": {
                     "type": "keyword"
                 },
-                "subtitle_start": {
-                    "type": "text"
-                },
                 "subtitle_end": {
                     "type": "text"
                 },
-                "subtitle_last_refresh": {
-                    "type": "date",
-                    "format": "epoch_second"
+                "subtitle_fragment_id": {
+                    "type": "keyword"
                 },
                 "subtitle_index": {
                     "type": "long"
@@ -651,12 +631,32 @@
                 "subtitle_lang": {
                     "type": "keyword"
                 },
-                "subtitle_source": {
-                    "type": "keyword"
+                "subtitle_last_refresh": {
+                    "type": "date",
+                    "format": "epoch_second"
                 },
                 "subtitle_line": {
                     "type": "text",
                     "analyzer": "english"
+                },
+                "subtitle_source": {
+                    "type": "keyword"
+                },
+                "subtitle_start": {
+                    "type": "text"
+                },
+                "title": {
+                    "type": "text",
+                    "fields": {
+                        "keyword": {
+                            "type": "keyword",
+                            "ignore_above": 256,
+                            "normalizer": "to_lower"
+                        }
+                    }
+                },
+                "youtube_id": {
+                    "type": "keyword"
                 }
             },
             "expected_set": {
diff --git a/backend/video/serializers.py b/backend/video/serializers.py
index 410a8ea8..c1b4ab03 100644
--- a/backend/video/serializers.py
+++ b/backend/video/serializers.py
@@ -65,18 +65,18 @@ class StreamItemSerializer(serializers.Serializer):
 class SubtitleFragmentSerializer(serializers.Serializer):
     """serialize subtitle fragment"""
 
-    subtitle_index = serializers.IntegerField()
-    subtitle_line = serializers.CharField()
-    subtitle_start = serializers.CharField()
-    subtitle_fragment_id = serializers.CharField()
-    subtitle_end = serializers.CharField()
-    youtube_id = serializers.CharField()
-    title = serializers.CharField()
     subtitle_channel = serializers.CharField()
     subtitle_channel_id = serializers.CharField()
-    subtitle_last_refresh = serializers.IntegerField()
+    subtitle_end = serializers.CharField()
+    subtitle_fragment_id = serializers.CharField()
+    subtitle_index = serializers.IntegerField()
     subtitle_lang = serializers.CharField()
+    subtitle_last_refresh = serializers.IntegerField()
+    subtitle_line = serializers.CharField()
     subtitle_source = serializers.ChoiceField(choices=["user", "auto"])
+    subtitle_start = serializers.CharField()
+    title = serializers.CharField()
+    youtube_id = serializers.CharField()
 
 
 class SubtitleItemSerializer(serializers.Serializer):
diff --git a/backend/video/src/subtitle.py b/backend/video/src/subtitle.py
index a3c51566..1fdd0919 100644
--- a/backend/video/src/subtitle.py
+++ b/backend/video/src/subtitle.py
@@ -345,13 +345,13 @@ class SubtitleParser:
         documents = self._chunk_list(video.youtube_id)
         channel = video.json_data.get("channel")
         meta_dict = {
-            "youtube_id": video.youtube_id,
-            "title": video.json_data.get("title"),
             "subtitle_channel": channel.get("channel_name"),
             "subtitle_channel_id": channel.get("channel_id"),
-            "subtitle_last_refresh": int(datetime.now().timestamp()),
             "subtitle_lang": self.lang,
+            "subtitle_last_refresh": int(datetime.now().timestamp()),
             "subtitle_source": source,
+            "title": video.json_data.get("title"),
+            "youtube_id": video.youtube_id,
         }
 
         _ = [i.update(meta_dict) for i in documents]