diff --git a/api/funkwhale_api/radios/radios.py b/api/funkwhale_api/radios/radios.py
index 10dc10cb8..6fabdf61a 100644
--- a/api/funkwhale_api/radios/radios.py
+++ b/api/funkwhale_api/radios/radios.py
@@ -123,7 +123,7 @@ class SessionRadio(SimpleRadio):
         # get cached RadioTracks if any
         try:
             cached_evaluated_radio_tracks = pickle.loads(
-                cache.get(f"radiosessiontracks{self.session.id}")
+                cache.get(f"radiotracks{self.session.id}")
             )
         except TypeError:
             cached_evaluated_radio_tracks = None
@@ -145,26 +145,25 @@ class SessionRadio(SimpleRadio):
             raise ValueError("No more radio candidates")
 
         # create the radio session tracks into db in bulk
-        radio_tracks = self.session.add(sliced_queryset)
+        self.session.add(sliced_queryset)
 
         # evaluate the queryset to save it in cache
+        radio_tracks = list(sliced_queryset)
+
         if cached_evaluated_radio_tracks is not None:
-            radio_tracks = list(radio_tracks)
             radio_tracks.extend(cached_evaluated_radio_tracks)
         logger.info(
             f"Setting redis cache for radio generation with radio id {self.session.id}"
         )
-        cache.set(
-            f"radiosessiontracks{self.session.id}", pickle.dumps(radio_tracks), 3600
-        )
+        cache.set(f"radiotracks{self.session.id}", pickle.dumps(radio_tracks), 3600)
         cache.set(f"radioqueryset{self.session.id}", sliced_queryset, 3600)
 
         return sliced_queryset
 
     def get_choices_v2(self, quantity, **kwargs):
-        if cache.get(f"radiosessiontracks{self.session.id}"):
+        if cache.get(f"radiotracks{self.session.id}"):
             cached_radio_tracks = pickle.loads(
-                cache.get(f"radiosessiontracks{self.session.id}")
+                cache.get(f"radiotracks{self.session.id}")
             )
             logger.info("Using redis cache for radio generation")
             radio_tracks = cached_radio_tracks
diff --git a/api/funkwhale_api/radios/views.py b/api/funkwhale_api/radios/views.py
index b442b1a97..e85e5cffe 100644
--- a/api/funkwhale_api/radios/views.py
+++ b/api/funkwhale_api/radios/views.py
@@ -213,11 +213,9 @@ class V2_RadioSessionViewSet(
             )
         # self.perform_create(serializer)
         # dirty override here, since we use a different serializer for creation and detail
-        evaluated_radio_tracks = pickle.loads(
-            cache.get(f"radiosessiontracks{session.id}")
-        )
+        evaluated_radio_tracks = pickle.loads(cache.get(f"radiotracks{session.id}"))
         batch = evaluated_radio_tracks[:count]
-        serializer = serializers.RadioSessionTrackSerializer(
+        serializer = TrackSerializer(
             data=batch,
             many="true",
         )
@@ -225,9 +223,7 @@ class V2_RadioSessionViewSet(
 
         # delete the tracks we sent from the cache
         new_cached_radiotracks = evaluated_radio_tracks[count:]
-        cache.set(
-            f"radiosessiontracks{session.id}", pickle.dumps(new_cached_radiotracks)
-        )
+        cache.set(f"radiotracks{session.id}", pickle.dumps(new_cached_radiotracks))
 
         return Response(
             serializer.data,
diff --git a/api/tests/radios/test_radios.py b/api/tests/radios/test_radios.py
index cd906d630..b3b4da18d 100644
--- a/api/tests/radios/test_radios.py
+++ b/api/tests/radios/test_radios.py
@@ -221,8 +221,7 @@ def test_can_get_track_for_session_from_api_v2(factories, logged_in_api_client):
     response = logged_in_api_client.get(url, {"session": session.pk})
     data = json.loads(response.content.decode("utf-8"))
 
-    assert data[0]["track"]["id"] == track.pk
-    assert data[0]["position"] == 1
+    assert data[0]["id"] == track.pk
 
     next_track = factories["music.Upload"](
         library__actor=actor, import_status="finished"
@@ -230,8 +229,7 @@ def test_can_get_track_for_session_from_api_v2(factories, logged_in_api_client):
     response = logged_in_api_client.get(url, {"session": session.pk})
     data = json.loads(response.content.decode("utf-8"))
 
-    assert data[0]["track"]["id"] == next_track.id
-    assert data[0]["position"] == 2
+    assert data[0]["id"] == next_track.id
 
 
 def test_related_object_radio_validate_related_object(factories):
@@ -489,9 +487,9 @@ def test_session_radio_excludes_previous_picks_v2(factories, logged_in_api_clien
             url, {"session": session.pk, "filter_playable": False}
         )
         pick = json.loads(response.content.decode("utf-8"))
-        assert pick[0]["track"]["title"] not in previous_choices
-        assert pick[0]["track"]["title"] in [t.title for t in tracks]
-        previous_choices.append(pick[0]["track"]["title"])
+        assert pick[0]["title"] not in previous_choices
+        assert pick[0]["title"] in [t.title for t in tracks]
+        previous_choices.append(pick[0]["title"])
 
     response = logged_in_api_client.get(url, {"session": session.pk})
     assert (
@@ -540,8 +538,8 @@ def test_can_cache_radio_track(factories):
     session = radio.start_session(user)
     picked = session.radio.pick_many_v2(quantity=1, filter_playable=False)
     assert len(picked) == 1
-    for t in pickle.loads(cache.get(f"radiosessiontracks{session.id}")):
-        assert t.track in uploads
+    for t in pickle.loads(cache.get(f"radiotracks{session.id}")):
+        assert t in uploads
 
 
 def test_regenerate_cache_if_not_enought_tracks_in_it(