diff --git a/core/lib/Drupal/Core/Database/Query/Merge.php b/core/lib/Drupal/Core/Database/Query/Merge.php
index 3d7564a..4a265b0 100644
--- a/core/lib/Drupal/Core/Database/Query/Merge.php
+++ b/core/lib/Drupal/Core/Database/Query/Merge.php
@@ -412,8 +412,7 @@ public function execute() {
         throw new InvalidMergeQueryException(t('Invalid merge query: no conditions'));
       }
       $select = $this->connection->select($this->conditionTable)
-        ->condition($this->condition)
-        ->forUpdate();
+        ->condition($this->condition);
       $select->addExpression('1');
       if (!$select->execute()->fetchField()) {
         try {