Update src/utils/nodeUtil.tsx

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: EmilyyyLiu

src/utils/nodeUtil.tsx

@@ -51,7 +51,7 @@ function convertItemsToNodes(
         const hasExtra = !!extra || extra === 0;
 
         return (
-          <MergedMenuItem key={mergedKey} {...restProps} extra={extra} itemData={opt}>
+          <MergedMenuItem key={mergedKey} {...restProps} extra={extra} itemData={{ ...opt, key: mergedKey }}>
             {hasExtra ? (
               <>
                 <span className={`${prefixCls}-item-label`}>{label}</span>