diff --git a/wp-includes/post.php b/wp-includes/post.php
index ca30890169..0bf6c52654 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -6327,12 +6327,12 @@ function is_local_attachment( $url ) {
  *
  * @param string|array $args             Arguments for inserting an attachment.
  * @param string|false $file             Optional. Filename.
- * @param int          $parent_post      Optional. Parent post ID.
+ * @param int          $parent_post_id   Optional. Parent post ID.
  * @param bool         $wp_error         Optional. Whether to return a WP_Error on failure. Default false.
  * @param bool         $fire_after_hooks Optional. Whether to fire the after insert hooks. Default true.
  * @return int|WP_Error The attachment ID on success. The value 0 or WP_Error on failure.
  */
-function wp_insert_attachment( $args, $file = false, $parent_post = 0, $wp_error = false, $fire_after_hooks = true ) {
+function wp_insert_attachment( $args, $file = false, $parent_post_id = 0, $wp_error = false, $fire_after_hooks = true ) {
 	$defaults = array(
 		'file'        => $file,
 		'post_parent' => 0,
@@ -6340,8 +6340,8 @@ function wp_insert_attachment( $args, $file = false, $parent_post = 0, $wp_error
 
 	$data = wp_parse_args( $args, $defaults );
 
-	if ( ! empty( $parent_post ) ) {
-		$data['post_parent'] = $parent_post;
+	if ( ! empty( $parent_post_id ) ) {
+		$data['post_parent'] = $parent_post_id;
 	}
 
 	$data['post_type'] = 'attachment';
diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
index 210505c862..61fd9233e3 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-revisions-controller.php
@@ -134,21 +134,21 @@ class WP_REST_Revisions_Controller extends WP_REST_Controller {
 	 *
 	 * @since 4.7.2
 	 *
-	 * @param int $parent_post Supplied ID.
+	 * @param int $parent_post_id Supplied ID.
 	 * @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.
 	 */
-	protected function get_parent( $parent_post ) {
+	protected function get_parent( $parent_post_id ) {
 		$error = new WP_Error(
 			'rest_post_invalid_parent',
 			__( 'Invalid post parent ID.' ),
 			array( 'status' => 404 )
 		);
 
-		if ( (int) $parent_post <= 0 ) {
+		if ( (int) $parent_post_id <= 0 ) {
 			return $error;
 		}
 
-		$parent_post = get_post( (int) $parent_post );
+		$parent_post = get_post( (int) $parent_post_id );
 
 		if ( empty( $parent_post ) || empty( $parent_post->ID )
 			|| $this->parent_post_type !== $parent_post->post_type
diff --git a/wp-includes/version.php b/wp-includes/version.php
index f39f66bfd9..4dcf8aa314 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.2-alpha-55020';
+$wp_version = '6.2-alpha-55021';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.