diff --git a/app/src/main/java/core/notevault/data/MusicNoteDAO.java b/app/src/main/java/core/notevault/data/MusicNoteDAO.java
index c58e171..470f7d8 100644
--- a/app/src/main/java/core/notevault/data/MusicNoteDAO.java
+++ b/app/src/main/java/core/notevault/data/MusicNoteDAO.java
@@ -3,6 +3,7 @@ package core.notevault.data;
 import androidx.room.*;
 import core.notevault.data.sync.SyncResponse;
 import core.notevault.data.sync.SyncStatus;
+import core.notevault.sync.synchronisation.songs.creation.SongCreationResponse;
 
 import java.time.LocalDateTime;
 import java.util.List;
@@ -52,18 +53,13 @@ public interface MusicNoteDAO {
     @Query("DELETE FROM concert_songs WHERE concertID = :concertID AND musicNoteID = :songID")
     void deleteConcertSong(long songID, int concertID);
 
-    @Query("UPDATE concerts SET serverSpecificConcertID = :serverUUID WHERE id = :concertID")
     @Transaction
-    void updateConcertServerUUID(String serverUUID, int concertID);
+    default void storeSongSyncResponses(List<SongCreationResponse> songCreationResponses) {
+        for (SongCreationResponse response : songCreationResponses) {
+            storeSongSyncResponse(response.getLocalID(), SyncStatus.SYNCED, response.getServerID());
+        }
+    }
 
-    // Methode für das batchweise Update der Konzert-ServerUUIDs
-    @Query("DELETE FROM concerts WHERE serverSpecificConcertID IN (:serverSpecificIDs)")
-    void deleteConcerts(List<String> serverSpecificIDs);
-
-    @Insert
-    @Transaction
-    void insertSyncResponses(List<SyncResponse> syncResponses);
-
-    @Query("SELECT MAX(lastModified) FROM concerts")
-    LocalDateTime getLatestSyncTimestamp();
+    @Query("UPDATE music_notes SET syncStatus = :status, serverID = :serverID WHERE musicNoteId = :localID")
+    void storeSongSyncResponse(long localID, SyncStatus status, String serverID);
 }
diff --git a/app/src/main/java/core/notevault/sync/synchronisation/songs/SongSyncWorker.java b/app/src/main/java/core/notevault/sync/synchronisation/songs/SongSyncWorker.java
index 65014fc..2327a07 100644
--- a/app/src/main/java/core/notevault/sync/synchronisation/songs/SongSyncWorker.java
+++ b/app/src/main/java/core/notevault/sync/synchronisation/songs/SongSyncWorker.java
@@ -1,6 +1,7 @@
 package core.notevault.sync.synchronisation.songs;
 
 import android.content.Context;
+import android.os.AsyncTask;
 import android.widget.Toast;
 import core.notevault.data.MusicNote;
 import core.notevault.data.MusicNoteDAO;
@@ -15,11 +16,14 @@ import retrofit2.Response;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 public class SongSyncWorker {
     private SyncService syncService;
     private MusicNoteDAO database;
     private Context context;
+    private ExecutorService executorService = Executors.newSingleThreadExecutor();
 
     public SongSyncWorker(SyncService syncService, MusicNoteDAO database, Context context) {
         this.syncService = syncService;
@@ -42,7 +46,9 @@ public class SongSyncWorker {
             @Override
             public void onResponse(Call<SongCreationBatchResponse> call, Response<SongCreationBatchResponse> response) {
                 if(response.isSuccessful() && response.body() != null) {
-                    Toast.makeText(context, "Song creation synced: " + response.body().getSongs().size(), Toast.LENGTH_LONG).show();
+                    executorService.execute(() -> {
+                        database.storeSongSyncResponses(response.body().getSongs());
+                    });
                 } else {
                     Toast.makeText(context, "Song creation failed", Toast.LENGTH_LONG).show();
                 }
diff --git a/music_database b/music_database
deleted file mode 100644
index f051267..0000000
Binary files a/music_database and /dev/null differ