diff --git a/wp-includes/blocks.php b/wp-includes/blocks.php
index 56410779fe..5b5524494d 100644
--- a/wp-includes/blocks.php
+++ b/wp-includes/blocks.php
@@ -1676,13 +1676,13 @@ function get_comment_delimited_block_content( $block_name, $block_attributes, $b
  * @param array $block {
  *     An associative array of a single parsed block object. See WP_Block_Parser_Block.
  *
- *     @type string   $blockName    Name of block.
- *     @type array    $attrs        Attributes from block comment delimiters.
- *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
- *                                  have the same structure as this one.
- *     @type string   $innerHTML    HTML from inside block comment delimiters.
- *     @type array    $innerContent List of string fragments and null markers where
- *                                  inner blocks were found.
+ *     @type string|null $blockName    Name of block.
+ *     @type array       $attrs        Attributes from block comment delimiters.
+ *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+ *                                     have the same structure as this one.
+ *     @type string      $innerHTML    HTML from inside block comment delimiters.
+ *     @type array       $innerContent List of string fragments and null markers where
+ *                                     inner blocks were found.
  * }
  * @return string String of rendered HTML.
  */
@@ -1717,13 +1717,13 @@ function serialize_block( $block ) {
  *     @type array ...$0 {
  *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
  *
- *         @type string   $blockName    Name of block.
- *         @type array    $attrs        Attributes from block comment delimiters.
- *         @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
- *                                      have the same structure as this one.
- *         @type string   $innerHTML    HTML from inside block comment delimiters.
- *         @type array    $innerContent List of string fragments and null markers where
- *                                      inner blocks were found.
+ *         @type string|null $blockName    Name of block.
+ *         @type array       $attrs        Attributes from block comment delimiters.
+ *         @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+ *                                         have the same structure as this one.
+ *         @type string      $innerHTML    HTML from inside block comment delimiters.
+ *         @type array       $innerContent List of string fragments and null markers where
+ *                                         inner blocks were found.
  *     }
  * }
  * @return string String of rendered HTML.
@@ -2244,13 +2244,13 @@ function _excerpt_render_inner_blocks( $parsed_block, $allowed_blocks ) {
  * @param array $parsed_block {
  *     An associative array of the block being rendered. See WP_Block_Parser_Block.
  *
- *     @type string   $blockName    Name of block.
- *     @type array    $attrs        Attributes from block comment delimiters.
- *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
- *                                  have the same structure as this one.
- *     @type string   $innerHTML    HTML from inside block comment delimiters.
- *     @type array    $innerContent List of string fragments and null markers where
- *                                  inner blocks were found.
+ *     @type string|null $blockName    Name of block.
+ *     @type array       $attrs        Attributes from block comment delimiters.
+ *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+ *                                     have the same structure as this one.
+ *     @type string      $innerHTML    HTML from inside block comment delimiters.
+ *     @type array       $innerContent List of string fragments and null markers where
+ *                                     inner blocks were found.
  * }
  * @return string String of rendered HTML.
  */
@@ -2268,13 +2268,13 @@ function render_block( $parsed_block ) {
 	 * @param array         $parsed_block {
 	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
 	 *
-	 *     @type string   $blockName    Name of block.
-	 *     @type array    $attrs        Attributes from block comment delimiters.
-	 *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
-	 *                                  have the same structure as this one.
-	 *     @type string   $innerHTML    HTML from inside block comment delimiters.
-	 *     @type array    $innerContent List of string fragments and null markers where
-	 *                                  inner blocks were found.
+	 *     @type string|null $blockName    Name of block.
+	 *     @type array       $attrs        Attributes from block comment delimiters.
+	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+	 *                                     have the same structure as this one.
+	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
+	 *     @type array       $innerContent List of string fragments and null markers where
+	 *                                     inner blocks were found.
 	 * }
 	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
 	 */
@@ -2294,25 +2294,25 @@ function render_block( $parsed_block ) {
 	 * @param array         $parsed_block {
 	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
 	 *
-	 *     @type string   $blockName    Name of block.
-	 *     @type array    $attrs        Attributes from block comment delimiters.
-	 *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
-	 *                                  have the same structure as this one.
-	 *     @type string   $innerHTML    HTML from inside block comment delimiters.
-	 *     @type array    $innerContent List of string fragments and null markers where
-	 *                                  inner blocks were found.
+	 *     @type string|null $blockName    Name of block.
+	 *     @type array       $attrs        Attributes from block comment delimiters.
+	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+	 *                                     have the same structure as this one.
+	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
+	 *     @type array       $innerContent List of string fragments and null markers where
+	 *                                     inner blocks were found.
 	 * }
 	 * @param array         $source_block {
 	 *     An un-modified copy of `$parsed_block`, as it appeared in the source content.
 	 *     See WP_Block_Parser_Block.
 	 *
-	 *     @type string   $blockName    Name of block.
-	 *     @type array    $attrs        Attributes from block comment delimiters.
-	 *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
-	 *                                  have the same structure as this one.
-	 *     @type string   $innerHTML    HTML from inside block comment delimiters.
-	 *     @type array    $innerContent List of string fragments and null markers where
-	 *                                  inner blocks were found.
+	 *     @type string|null $blockName    Name of block.
+	 *     @type array       $attrs        Attributes from block comment delimiters.
+	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+	 *                                     have the same structure as this one.
+	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
+	 *     @type array       $innerContent List of string fragments and null markers where
+	 *                                     inner blocks were found.
 	 * }
 	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
 	 */
@@ -2342,13 +2342,13 @@ function render_block( $parsed_block ) {
 	 * @param array         $parsed_block {
 	 *     An associative array of the block being rendered. See WP_Block_Parser_Block.
 	 *
-	 *     @type string   $blockName    Name of block.
-	 *     @type array    $attrs        Attributes from block comment delimiters.
-	 *     @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
-	 *                                  have the same structure as this one.
-	 *     @type string   $innerHTML    HTML from inside block comment delimiters.
-	 *     @type array    $innerContent List of string fragments and null markers where
-	 *                                  inner blocks were found.
+	 *     @type string|null $blockName    Name of block.
+	 *     @type array       $attrs        Attributes from block comment delimiters.
+	 *     @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+	 *                                     have the same structure as this one.
+	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
+	 *     @type array       $innerContent List of string fragments and null markers where
+	 *                                     inner blocks were found.
 	 * }
 	 * @param WP_Block|null $parent_block If this is a nested block, a reference to the parent block.
 	 */
@@ -2371,13 +2371,13 @@ function render_block( $parsed_block ) {
  *     @type array ...$0 {
  *         An associative array of a single parsed block object. See WP_Block_Parser_Block.
  *
- *         @type string   $blockName    Name of block.
- *         @type array    $attrs        Attributes from block comment delimiters.
- *         @type array[]  $innerBlocks  List of inner blocks. An array of arrays that
- *                                      have the same structure as this one.
- *         @type string   $innerHTML    HTML from inside block comment delimiters.
- *         @type array    $innerContent List of string fragments and null markers where
- *                                      inner blocks were found.
+ *         @type string|null $blockName    Name of block.
+ *         @type array       $attrs        Attributes from block comment delimiters.
+ *         @type array[]     $innerBlocks  List of inner blocks. An array of arrays that
+ *                                         have the same structure as this one.
+ *         @type string      $innerHTML    HTML from inside block comment delimiters.
+ *         @type array       $innerContent List of string fragments and null markers where
+ *                                         inner blocks were found.
  *     }
  * }
  */
diff --git a/wp-includes/class-wp-block.php b/wp-includes/class-wp-block.php
index e3b97f6501..fcbc749cec 100644
--- a/wp-includes/class-wp-block.php
+++ b/wp-includes/class-wp-block.php
@@ -29,7 +29,7 @@ class WP_Block {
 	 * @example "core/paragraph"
 	 *
 	 * @since 5.5.0
-	 * @var string
+	 * @var string|null
 	 */
 	public $name;
 
@@ -114,12 +114,12 @@ class WP_Block {
 	 * @param array                  $block             {
 	 *     An associative array of a single parsed block object. See WP_Block_Parser_Block.
 	 *
-	 *     @type string   $blockName    Name of block.
-	 *     @type array    $attrs        Attributes from block comment delimiters.
-	 *     @type array    $innerBlocks  List of inner blocks. An array of arrays that
-	 *                                  have the same structure as this one.
-	 *     @type string   $innerHTML    HTML from inside block comment delimiters.
-	 *     @type array    $innerContent List of string fragments and null markers where inner blocks were found.
+	 *     @type string|null $blockName    Name of block.
+	 *     @type array       $attrs        Attributes from block comment delimiters.
+	 *     @type array       $innerBlocks  List of inner blocks. An array of arrays that
+	 *                                     have the same structure as this one.
+	 *     @type string      $innerHTML    HTML from inside block comment delimiters.
+	 *     @type array       $innerContent List of string fragments and null markers where inner blocks were found.
 	 * }
 	 * @param array                  $available_context Optional array of ancestry context values.
 	 * @param WP_Block_Type_Registry $registry          Optional block type registry.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d3511b812f..8f84a4652c 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.9-alpha-60510';
+$wp_version = '6.9-alpha-60511';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.