diff --git a/wp-includes/class-wp-block-styles-registry.php b/wp-includes/class-wp-block-styles-registry.php
index 4f4b57ba50..32496321c6 100644
--- a/wp-includes/class-wp-block-styles-registry.php
+++ b/wp-includes/class-wp-block-styles-registry.php
@@ -2,7 +2,8 @@
 /**
  * Blocks API: WP_Block_Styles_Registry class
  *
- * @package Gutenberg
+ * @package WordPress
+ * @subpackage Blocks
  * @since 5.3.0
  */
 
@@ -41,14 +42,14 @@ final class WP_Block_Styles_Registry {
 	public function register( $block_name, $style_properties ) {
 
 		if ( ! isset( $block_name ) || ! is_string( $block_name ) ) {
-			$message = __( 'Block name name must be a string.', 'gutenberg' );
-			_doing_it_wrong( __METHOD__, $message, '6.2.0' );
+			$message = __( 'Block name name must be a string.' );
+			_doing_it_wrong( __METHOD__, $message, '5.3.0' );
 			return false;
 		}
 
 		if ( ! isset( $style_properties['name'] ) || ! is_string( $style_properties['name'] ) ) {
-			$message = __( 'Block style name must be a string.', 'gutenberg' );
-			_doing_it_wrong( __METHOD__, $message, '6.2.0' );
+			$message = __( 'Block style name must be a string.' );
+			_doing_it_wrong( __METHOD__, $message, '5.3.0' );
 			return false;
 		}
 
@@ -73,8 +74,8 @@ final class WP_Block_Styles_Registry {
 	public function unregister( $block_name, $block_style_name ) {
 		if ( ! $this->is_registered( $block_name, $block_style_name ) ) {
 			/* translators: 1: block name, 2: block style name */
-			$message = sprintf( __( 'Block "%1$s" does not contain a style named "%2$s.".', 'gutenberg' ), $block_name, $block_style_name );
-			_doing_it_wrong( __METHOD__, $message, '6.2.0' );
+			$message = sprintf( __( 'Block "%1$s" does not contain a style named "%2$s.".' ), $block_name, $block_style_name );
+			_doing_it_wrong( __METHOD__, $message, '5.3.0' );
 			return false;
 		}
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 6d109e1b92..f0053c9b7e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-beta1-46350';
+$wp_version = '5.3-beta1-46351';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.