diff --git a/wp-includes/blocks.php b/wp-includes/blocks.php
index 89007d0d0d..170d7c0fbf 100644
--- a/wp-includes/blocks.php
+++ b/wp-includes/blocks.php
@@ -971,6 +971,7 @@ function insert_hooked_blocks( &$parsed_anchor_block, $relative_position, $hooke
 			'blockName'    => $hooked_block_type,
 			'attrs'        => array(),
 			'innerBlocks'  => array(),
+			'innerHTML'    => '',
 			'innerContent' => array(),
 		);
 
diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php
index 3e4e8eb794..de7e147c38 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php
@@ -181,6 +181,7 @@ class WP_REST_Block_Renderer_Controller extends WP_REST_Controller {
 		$block = array(
 			'blockName'    => $request['name'],
 			'attrs'        => $attributes,
+			'innerBlocks'  => array(),
 			'innerHTML'    => '',
 			'innerContent' => array(),
 		);
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d0f92d13d2..24b64a499b 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '7.0-beta5-62038';
+$wp_version = '7.0-beta5-62039';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.