diff --git a/apps/user-app/components/chart.tsx b/apps/user-app/components/chart.tsx
index b038900..d60bd37 100644
--- a/apps/user-app/components/chart.tsx
+++ b/apps/user-app/components/chart.tsx
@@ -138,7 +138,7 @@ const ChartTooltipContent = React.forwardRef<
       }
 
       const [item] = payload;
-      const key = `${labelKey || item.dataKey || item.name || "value"}`;
+      const key = `${labelKey || item?.dataKey || item?.name || "value"}`;
       const itemConfig = getPayloadConfigFromPayload(config, item, key);
       const value =
         !labelKey && typeof label === "string"