From a08a7ff0ef2845092e480fa10d0e31f924cbe4a8 Mon Sep 17 00:00:00 2001
From: bunsenstraat <filip.mertens@ethereum.org>
Date: Mon, 28 Feb 2022 08:28:02 +0100
Subject: [PATCH] fix key error

---
 libs/remix-ui/solidity-compiler/src/lib/compiler-container.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/remix-ui/solidity-compiler/src/lib/compiler-container.tsx b/libs/remix-ui/solidity-compiler/src/lib/compiler-container.tsx
index 9555cd12cc..f2efb75360 100644
--- a/libs/remix-ui/solidity-compiler/src/lib/compiler-container.tsx
+++ b/libs/remix-ui/solidity-compiler/src/lib/compiler-container.tsx
@@ -547,7 +547,7 @@ export const CompilerContainer = (props: CompilerContainerProps) => {
           <div className="mb-2">
             <label className="remixui_compilerLabel form-check-label" htmlFor="evmVersionSelector">EVM Version</label>
             <select value={state.evmVersion} onChange={(e) => handleEvmVersionChange(e.target.value)} className="custom-select" id="evmVersionSelector">
-              {compileTabLogic.evmVersions.map((version) => (<option data-id={state.evmVersion === version ? 'selected' : ''} value={version}>{version}</option>))}
+              {compileTabLogic.evmVersions.map((version, index) => (<option key={index} data-id={state.evmVersion === version ? 'selected' : ''} value={version}>{version}</option>))}
             </select>
           </div>
           <div className="mt-3">