diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php b/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
index 103ea43..8cf64a2 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/query/Sql.php
@@ -296,7 +296,7 @@ function add_relationship($alias, JoinPluginBase $join, $base, $link_point = NUL
     }
 
     // Make sure $alias isn't already used; if it, start adding stuff.
-    $alias_base = $alias;
+    $alias_base = drupal_substr($alias, 0, 1);
     $count = 1;
     while (!empty($this->relationships[$alias])) {
       $alias = $alias_base . '_' . $count++;