diff --git a/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/SbItem.jsx b/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/SbItem.jsx
index 8912f76..748b9ae 100644
--- a/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/SbItem.jsx
+++ b/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/SbItem.jsx
@@ -30,7 +30,7 @@ const SbItem = ({item, openDocCode, updateDocCode}) => {
                 <SbTitle depth={item.doc_level} onClick={toggleCollapse}>{icon1}{icon2}&nbsp;{(item.doc_level === 1?'':item.doc_code)+' '+item.doc_code_name}</SbTitle>
                 <SbSub isOpen={collapsed}>
                     {item.childrens.map((child) => (
-                        <SbItem item={child} openDocCode={openDocCode} updateDocCode={updateDocCode} />
+                        <SbItem key={child.seq} item={child} openDocCode={openDocCode} updateDocCode={updateDocCode} />
                     ))}
                 </SbSub>
             </div>
diff --git a/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/ViewerTree.jsx b/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/ViewerTree.jsx
index 0ae311e..dfce886 100644
--- a/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/ViewerTree.jsx
+++ b/egovframe-template-simple-react-contribution/src/pages/standardCode/viewer/ViewerTree.jsx
@@ -38,7 +38,7 @@ function ViewerTree({docCode, updateDocCode, setTreeLoading}){
     return (
         <SbContainer>
             {tree.map((subItem) =>
-                <SbItem item={subItem} openDocCode={docCode} updateDocCode={updateDocCode} />
+                <SbItem key={subItem.seq} item={subItem} openDocCode={docCode} updateDocCode={updateDocCode} />
             )}
         </SbContainer>
     );