diff --git a/packages/jupyter-ai/src/components/pending-messages.tsx b/packages/jupyter-ai/src/components/pending-messages.tsx
index 33fbfdca8..d1f5c0ddc 100644
--- a/packages/jupyter-ai/src/components/pending-messages.tsx
+++ b/packages/jupyter-ai/src/components/pending-messages.tsx
@@ -95,9 +95,9 @@ export function PendingMessages(
             }
           }}
         >
-          {props.messages.map((message, j) => (
+          {props.messages.map((message) => (
             <PendingMessageElement
-              key={j}
+              key={message.id}
               text={message.body}
               ellipsis={message.ellipsis}
             />