diff --git a/app.py b/app.py
index 46825f1..d8ae298 100644
--- a/app.py
+++ b/app.py
@@ -33,6 +33,7 @@ from flask_session import Session
 from flask_wtf.csrf import CSRFProtect, generate_csrf, CSRFError
 from ffmpy import FFmpeg
 from pymongo import MongoClient
+from pymongo.errors import DuplicateKeyError
 from redis import Redis
 
 def take_config(name, required=False):
@@ -852,8 +853,12 @@ def upload_file():
         db_entry['enabled'] = True
         pprint.pprint(db_entry)
 
-        # mongoDBにデータをぶち込む
-        client['taiko']["songs"].insert_one(db_entry)
+        # mongoDBにデータをぶち込む（重複IDは上書き）
+        coll = client['taiko']["songs"]
+        try:
+            coll.insert_one(db_entry)
+        except DuplicateKeyError:
+            coll.replace_one({"id": db_entry["id"]}, db_entry, upsert=True)
         # キャッシュ削除（/api/songs）
         try:
             app.cache.delete_memoized(route_api_songs)