diff --git a/backport-changelog/6.9/8063.md b/backport-changelog/6.9/8063.md
index 8a4613e59e2bd0..004b8b9a194af2 100644
--- a/backport-changelog/6.9/8063.md
+++ b/backport-changelog/6.9/8063.md
@@ -2,5 +2,6 @@ https://github.com/WordPress/wordpress-develop/pull/8063
 
 * https://github.com/WordPress/gutenberg/pull/67125
 * https://github.com/WordPress/gutenberg/pull/71811
+* https://github.com/WordPress/gutenberg/pull/72003
 * https://github.com/WordPress/gutenberg/pull/72029
 * https://github.com/WordPress/gutenberg/pull/72049
diff --git a/lib/compat/wordpress-6.9/site-editor-redirect.php b/lib/compat/wordpress-6.9/site-editor-redirect.php
new file mode 100644
index 00000000000000..401a5fae06d5ab
--- /dev/null
+++ b/lib/compat/wordpress-6.9/site-editor-redirect.php
@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * Maps old site editor urls to the new updated ones.
+ *
+ * @since 6.9.0
+ * @access private
+ *
+ * @global string $pagenow The filename of the current screen.
+ *
+ * @return string|false The new URL to redirect to, or false if no redirection is needed.
+ */
+function gutenberg_get_site_editor_redirection_6_9() {
+	global $pagenow;
+
+	if ( 'site-editor.php' !== $pagenow ) {
+		return false;
+	}
+
+	// The following redirects are for the new permalinks in the site editor.
+	// /wp_template/tt5//home -> /wp_registered_template/tt5//home
+	if ( isset( $_REQUEST['p'] ) && preg_match( '#^/wp_template/([a-zA-Z0-9-]+//[a-zA-Z0-9-]+)$#', $_REQUEST['p'], $matches ) ) {
+		return add_query_arg( array( 'p' => '/wp_registered_template/' . $matches[1] ), remove_query_arg( array( 'p' ) ) );
+	}
+
+	return false;
+}
+
+/**
+ * Redirect old site editor urls to the new updated ones.
+ */
+function gutenberg_redirect_site_editor_deprecated_urls_6_9() {
+	$redirection = gutenberg_get_site_editor_redirection_6_9();
+	if ( false !== $redirection ) {
+		wp_safe_redirect( $redirection );
+		exit;
+	}
+}
+add_action( 'admin_init', 'gutenberg_redirect_site_editor_deprecated_urls_6_9' );
diff --git a/lib/load.php b/lib/load.php
index 83bdd73d730a83..b0376b144cb46f 100644
--- a/lib/load.php
+++ b/lib/load.php
@@ -90,6 +90,7 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/compat/wordpress-6.9/command-palette.php';
 require __DIR__ . '/compat/wordpress-6.9/preload.php';
 require __DIR__ . '/compat/wordpress-6.9/l10n.php';
+require __DIR__ . '/compat/wordpress-6.9/site-editor-redirect.php';
 
 // WordPress 7.0 compat.
 require __DIR__ . '/compat/wordpress-7.0/php-only-blocks.php';