tried something, didn't work, here we are

src/routes/blog/+page.svelte

@@ -11,7 +11,9 @@
         if (entry.post.banner && entry.post.banner !== "") {
             banner = `/blog/${entry.key}/${entry.post.banner}`;
         }
+
         return {
+            key: entry.key,
             title: `${entry.post.title}`,
             subtitle: `#${posts.length - index} // ${entry.post.date}, ${entry.post.time}`,
             img: banner,