diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php
index 487df7f4f6..3a4b488127 100644
--- a/wp-admin/includes/plugin.php
+++ b/wp-admin/includes/plugin.php
@@ -2292,7 +2292,7 @@ function plugin_sandbox_scrape( $plugin ) {
 	}
 
 	wp_register_plugin_realpath( WP_PLUGIN_DIR . '/' . $plugin );
-	include WP_PLUGIN_DIR . '/' . $plugin;
+	include_once WP_PLUGIN_DIR . '/' . $plugin;
 }
 
 /**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index d6a6466b9d..4bf39dbb7a 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-50787';
+$wp_version = '5.8-alpha-50788';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.