diff --git a/src/components/BalanceList.test.tsx b/src/components/BalanceList.test.tsx
index 456ab9b..e97aed8 100644
--- a/src/components/BalanceList.test.tsx
+++ b/src/components/BalanceList.test.tsx
@@ -377,4 +377,41 @@ describe("BalanceList", () => {
       expect(badgeOrder()).toEqual(["USDC", "USDT"]);
     });
   });
+
+  describe("duplicate key prevention (#601)", () => {
+    it("renders without console duplicate key warnings when multiple balances share identical asset fields", () => {
+      const consoleSpy = vi.spyOn(console, "error").mockImplementation(() => {});
+
+      const duplicateAsset1 = {
+        asset: "DUPLICATE_ASSET",
+        balance: "10.0000000",
+        assetType: "credit_alphanum4" as const,
+        assetCode: "DUP",
+        assetIssuer: "GISSUER11111111111111111111111111111111111111111111",
+      };
+
+      const duplicateAsset2 = {
+        asset: "DUPLICATE_ASSET",
+        balance: "20.0000000",
+        assetType: "credit_alphanum4" as const,
+        assetCode: "DUP",
+        assetIssuer: "GISSUER22222222222222222222222222222222222222222222",
+      };
+
+      vi.mocked(useSorokit).mockReturnValue({
+        balances: [duplicateAsset1, duplicateAsset2],
+        isLoadingAccount: false,
+        isConnected: true,
+      } as unknown as ReturnType<typeof useSorokit>);
+
+      render(<BalanceList />);
+
+      const duplicateWarnings = consoleSpy.mock.calls.filter(([msg]) =>
+        typeof msg === "string" && msg.includes("same key")
+      );
+
+      expect(duplicateWarnings).toHaveLength(0);
+      consoleSpy.mockRestore();
+    });
+  });
 });
diff --git a/src/components/BalanceList.tsx b/src/components/BalanceList.tsx
index dae7aa2..0dd953e 100644
--- a/src/components/BalanceList.tsx
+++ b/src/components/BalanceList.tsx
@@ -195,9 +195,9 @@ export function BalanceList({ onAssetClick, detailRef }: BalanceListProps) {
         </div>
       ) : (
         <div>
-          {sorted.map((b) => (
+          {sorted.map((b, idx) => (
             <AssetRow
-              key={b.asset}
+              key={`${b.assetType}-${b.assetCode ?? b.asset}-${b.assetIssuer ?? idx}`}
               b={b}
               onClick={onAssetClick ? () => handleAssetClick(b) : undefined}
             />