diff --git a/src/wp-includes/class-wp-query.php b/src/wp-includes/class-wp-query.php
index a52b5a484e841..3fcb942aa782a 100644
--- a/src/wp-includes/class-wp-query.php
+++ b/src/wp-includes/class-wp-query.php
@@ -3191,7 +3191,7 @@ public function get_posts() {
 
 						return $this->posts;
 					} elseif ( 'id=>parent' === $q['fields'] ) {
-						_prime_post_parents_caches( $post_ids );
+						_prime_post_parent_id_caches( $post_ids );
 
 						/** @var int[] */
 						$post_parents = wp_cache_get_multiple( $post_ids, 'post_parent' );
diff --git a/src/wp-includes/default-filters.php b/src/wp-includes/default-filters.php
index 99116470d59ef..6efc2126fa500 100644
--- a/src/wp-includes/default-filters.php
+++ b/src/wp-includes/default-filters.php
@@ -547,6 +547,7 @@
 add_action( 'admin_menu', '_add_post_type_submenus' );
 add_action( 'before_delete_post', '_reset_front_page_settings_for_post' );
 add_action( 'wp_trash_post', '_reset_front_page_settings_for_post' );
+add_action( 'save_post', '_set_post_parent_cache', 10, 2 );
 add_action( 'change_locale', 'create_initial_post_types' );
 
 // Post Formats.
diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 1f2c65e1580e4..d51b2cb6f3692 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -3559,6 +3559,22 @@ function _reset_front_page_settings_for_post( $post_id ) {
 	unstick_post( $post->ID );
 }
 
+/**
+ * Set or update the post parent cache for a specific post.
+ *
+ * This function sets or updates the post parent cache for a given post ID.
+ * The post parent cache is used to store the parent ID of a post for quick retrieval.
+ *
+ *  @since 6.4.0
+ *  @access private
+ *
+ * @param int    $post_id The ID of the post for which to set or update the parent cache.
+ * @param WP_Post $post   The post object representing the post.
+ */
+function _set_post_parent_cache( $post_id, $post ) {
+	wp_cache_set( $post_id, $post->post_parent, 'post_parent' );
+}
+
 /**
  * Moves a post or page to the Trash
  *
@@ -7805,7 +7821,7 @@ function _prime_post_caches( $ids, $update_term_cache = true, $update_meta_cache
  *
  * @param int[] $ids ID list.
  */
-function _prime_post_parents_caches( array $ids ) {
+function _prime_post_parent_id_caches( array $ids ) {
 	global $wpdb;
 
 	$non_cached_ids = _get_non_cached_ids( $ids, 'post_parent' );
diff --git a/tests/phpunit/tests/post/primePostParentsCaches.php b/tests/phpunit/tests/post/primePostParentIdCaches.php
similarity index 72%
rename from tests/phpunit/tests/post/primePostParentsCaches.php
rename to tests/phpunit/tests/post/primePostParentIdCaches.php
index a430450aabcf7..e9d0a65fb0f06 100644
--- a/tests/phpunit/tests/post/primePostParentsCaches.php
+++ b/tests/phpunit/tests/post/primePostParentIdCaches.php
@@ -1,19 +1,19 @@
 <?php
 /**
- * Test `_prime_post_parents_caches()`.
+ * Test `_prime_post_parent_id_caches()`.
  *
  * @package WordPress
  */
 
 /**
- * Test class for `_prime_post_parents_caches()`.
+ * Test class for `_prime_post_parent_id_caches()`.
  *
  * @group post
  * @group cache
  *
- * @covers ::_prime_post_parents_caches
+ * @covers ::_prime_post_parent_id_caches
  */
-class Tests_Post_PrimePostParentsCaches extends WP_UnitTestCase {
+class Tests_Post_PrimePostParentIdCaches extends WP_UnitTestCase {
 
 	/**
 	 * Post IDs.
@@ -34,11 +34,11 @@ public static function wpSetupBeforeClass( WP_UnitTest_Factory $factory ) {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches() {
+	public function test_prime_post_parent_id_caches() {
 		$post_id = self::$posts[0];
 
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $post_id ) );
+		_prime_post_parent_id_caches( array( $post_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries.' );
@@ -48,9 +48,9 @@ public function test_prime_post_parents_caches() {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_multiple() {
+	public function test_prime_post_parent_id_caches_multiple() {
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( self::$posts );
+		_prime_post_parent_id_caches( self::$posts );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries.' );
@@ -60,10 +60,10 @@ public function test_prime_post_parents_caches_multiple() {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_multiple_runs() {
-		_prime_post_parents_caches( self::$posts );
+	public function test_prime_post_parent_id_caches_multiple_runs() {
+		_prime_post_parent_id_caches( self::$posts );
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( self::$posts );
+		_prime_post_parent_id_caches( self::$posts );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 0, $num_queries, 'Unexpected number of queries.' );
@@ -72,15 +72,16 @@ public function test_prime_post_parents_caches_multiple_runs() {
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_update() {
-		$page_id            = self::factory()->post->create(
+	public function test_prime_post_parent_id_caches_update() {
+		$page_id = self::factory()->post->create(
 			array(
 				'post_type'   => 'page',
 				'post_parent' => self::$posts[0],
 			)
 		);
+		clean_post_cache( $page_id );
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $page_id ) );
+		_prime_post_parent_id_caches( array( $page_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries on first run' );
@@ -94,30 +95,31 @@ public function test_prime_post_parents_caches_update() {
 		);
 
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $page_id ) );
+		_prime_post_parent_id_caches( array( $page_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
-		$this->assertSame( 1, $num_queries, 'Unexpected number of queries on second run' );
+		$this->assertSame( 0, $num_queries, 'Unexpected number of queries on second run' );
 		$this->assertSameSets( array( self::$posts[1] ), wp_cache_get_multiple( array( $page_id ), 'post_parent' ), 'Array of parent ids with post 1 as parent' );
 	}
 
 	/**
 	 * @ticket 59188
 	 */
-	public function test_prime_post_parents_caches_delete() {
-		$parent_page_id     = self::factory()->post->create(
+	public function test_prime_post_parent_id_caches_delete() {
+		$parent_page_id = self::factory()->post->create(
 			array(
 				'post_type' => 'page',
 			)
 		);
-		$page_id            = self::factory()->post->create(
+		$page_id        = self::factory()->post->create(
 			array(
 				'post_type'   => 'page',
 				'post_parent' => $parent_page_id,
 			)
 		);
+		clean_post_cache( $page_id );
 		$before_num_queries = get_num_queries();
-		_prime_post_parents_caches( array( $page_id ) );
+		_prime_post_parent_id_caches( array( $page_id ) );
 		$num_queries = get_num_queries() - $before_num_queries;
 
 		$this->assertSame( 1, $num_queries, 'Unexpected number of queries on first run' );