diff --git a/libs/file_navigator.py b/libs/file_navigator.py
index a156353..5f18d34 100644
--- a/libs/file_navigator.py
+++ b/libs/file_navigator.py
@@ -1280,36 +1280,11 @@ class FileNavigator:
             for tja_path in sorted(tja_files):
                 song_key = str(tja_path)
                 if song_key not in self.all_song_files and tja_path.name == "dan.json":
-                    valid_dan = True
-                    with open(tja_path, 'r', encoding='utf-8') as f:
-                        data = json.load(f)
-                        for chart in data["charts"]:
-                            hash = chart["hash"]
-                            chart_title = chart["title"]
-                            chart_subtitle = chart["subtitle"]
-                            path = None
-
-                            if hash in global_data.song_hashes:
-                                path = Path(global_data.song_hashes[hash][0]["file_path"])
-                            else:
-                                # Fallback: search by title and subtitle
-                                found = False
-                                for key, value in global_data.song_hashes.items():
-                                    for i, song in enumerate(value):
-                                        if (song["title"]["en"].strip() == chart_title and
-                                            song["subtitle"]["en"].strip() == chart_subtitle.removeprefix('--') and
-                                            Path(song["file_path"]).exists()):
-                                            path = Path(song["file_path"])
-                                            found = True
-                                            break
-                                    if found:
-                                        break
-                            if path is None or not path.exists():
-                                valid_dan = False
-                                break
-                    if valid_dan:
+                    try:
                         song_obj = DanCourse(tja_path, tja_path.name)
                         self.all_song_files[song_key] = song_obj
+                    except Exception as e:
+                        logger.error(f"Error creating DanCourse object for {tja_path}: {e}")
                 elif song_key not in self.all_song_files and tja_path in global_data.song_paths:
                     song_obj = SongFile(tja_path, tja_path.name, back_color, fore_color, texture_index)
                     song_obj.box.get_scores()