diff --git a/backend/appsettings/src/config.py b/backend/appsettings/src/config.py
index 103a59ab..8bd81579 100644
--- a/backend/appsettings/src/config.py
+++ b/backend/appsettings/src/config.py
@@ -180,17 +180,17 @@ class AppConfig:
     def clear_old_keys(self) -> list[str]:
         """clear old unused keys"""
         cleared = []
-        for key, value in self.config.items():
+        for key in list(self.config.keys()):
             if key not in self.CONFIG_DEFAULTS:
                 # complete key removed
-                self.config.pop(key)
+                value = self.config.pop(key)
                 cleared.append(str({key: value}))
                 continue
 
             expected_keys = set(
                 self.CONFIG_DEFAULTS[key].keys()  # type: ignore
             )
-            is_keys = set(self.config[key].keys())
+            is_keys = set(list(self.config[key].keys()))
 
             for to_delete in is_keys - expected_keys:
                 self.config[key].pop(to_delete)
diff --git a/backend/appsettings/src/reindex.py b/backend/appsettings/src/reindex.py
index 2ed998ba..dacd6f6b 100644
--- a/backend/appsettings/src/reindex.py
+++ b/backend/appsettings/src/reindex.py
@@ -288,7 +288,7 @@ class Reindex(ReindexBase):
                 self._notify(name, total, idx)
 
             index_name = index_config["index_name"]
-            if index_name == "ta_vide":
+            if index_name == "ta_video":
                 video = self.reindex_single_video(youtube_id)
                 if video:
                     self._reindex_video_related(video)
diff --git a/backend/config/management/commands/ta_startup.py b/backend/config/management/commands/ta_startup.py
index 35daad7f..e65a701a 100644
--- a/backend/config/management/commands/ta_startup.py
+++ b/backend/config/management/commands/ta_startup.py
@@ -280,12 +280,11 @@ class Command(BaseCommand):
                     self.style.SUCCESS(f"    added new default: {new_default}")
                 )
 
-            # FIXME
-            # cleared = AppConfig().clear_old_keys()
-            # for removed_key in cleared:
-            #     self.stdout.write(
-            #         self.style.SUCCESS(f"    removed old key: {removed_key}")
-            #     )
+            cleared = AppConfig().clear_old_keys()
+            for removed_key in cleared:
+                self.stdout.write(
+                    self.style.SUCCESS(f"    removed old key: {removed_key}")
+                )
 
             return