refactor(SW-302): code cleanup

components/TempDesignSystem/Card/CardImage/index.tsx

@@ -15,10 +15,16 @@ export default function CardImage({
     <article className={`${styles.container} ${className}`}>
       <div className={styles.imageContainer}>
         {imageCards.map(
-          ({ backgroundImage }) =>
+          ({ backgroundImage }, idx: Number) =>
             backgroundImage && (
               <Image
-                key={backgroundImage.title}
+                key={
+                  (backgroundImage.title &&
+                    `${backgroundImage.title}-${idx}`) ||
+                  (backgroundImage.meta.caption &&
+                    `${backgroundImage.meta.caption}-${idx}`) ||
+                  backgroundImage.url
+                }
                 src={backgroundImage.url}
                 className={styles.image}
                 alt={backgroundImage.title}