diff --git a/src/PersonObjects/Sleeve/ui/CovenantPurchasesRoot.tsx b/src/PersonObjects/Sleeve/ui/CovenantPurchasesRoot.tsx
index 3c96b1347..0b21df916 100644
--- a/src/PersonObjects/Sleeve/ui/CovenantPurchasesRoot.tsx
+++ b/src/PersonObjects/Sleeve/ui/CovenantPurchasesRoot.tsx
@@ -58,7 +58,7 @@ export function CovenantPurchasesRoot(props: IProps): React.ReactElement {
   const upgradePanels = [];
   for (let i = 0; i < Player.sleeves.length; ++i) {
     const sleeve = Player.sleeves[i];
-    upgradePanels.push(<CovenantSleeveMemoryUpgrade index={i} rerender={rerender} sleeve={sleeve} />);
+    upgradePanels.push(<CovenantSleeveMemoryUpgrade key={i} index={i} rerender={rerender} sleeve={sleeve} />);
   }
 
   return (