diff --git a/app/packages/playback/src/lib/state.ts b/app/packages/playback/src/lib/state.ts
index a4e594292ad..2db21185703 100644
--- a/app/packages/playback/src/lib/state.ts
+++ b/app/packages/playback/src/lib/state.ts
@@ -229,6 +229,13 @@ export const addSubscriberAtom = atom(
       subscription,
     }: { name: TimelineName; subscription: SequenceTimelineSubscription }
   ) => {
+    // warn if subscription with this id already exists
+    if (get(_subscribers(name)).has(subscription.id)) {
+      console.warn(
+        `Subscription with ${subscription.id} already exists for timeline ${name}. Replacing old subscription. Make sure this is an intentional behavior.`
+      );
+    }
+
     const bufferManager = get(_dataLoadedBuffers(name));
 
     set(_subscribers(name), (prev) => {