fix error message

packages/app/src/components/Sidebar/PageTree/Item.tsx

@@ -301,7 +301,7 @@ const Item: FC<ItemProps> = (props: ItemProps) => {
     }
 
     if (page._id == null || page.path == null) {
-      throw Error('Any of _id and path must not be null.');
+      throw Error('_id and path must not be null.');
     }
 
     const pageToDelete: IPageToDeleteWithMeta = {