Ticket #21270: 21270.diff

wp-admin/network/site-themes.php

@@ -110 +110 @@
                         break;
         }
 
-        update_option( 'allowedthemes', $allowed_themes );
+        update_blog_option( $id, 'allowedthemes', $allowed_themes );
         restore_current_blog();
 
         wp_safe_redirect( add_query_arg( array( 'id' => $id, $action => $n ), $referer ) );