diff --git a/src/Google/Protobuf/Internal/Message.php b/src/Google/Protobuf/Internal/Message.php
index 017362a..7d10391 100644
--- a/src/Google/Protobuf/Internal/Message.php
+++ b/src/Google/Protobuf/Internal/Message.php
@@ -1597,7 +1597,7 @@ private function existField($field)
 
         $values = $this->$getter();
 
-        if (($field->getName() === 'incrementality' || $field->getName() === 'direction_id' || $field->getName() === 'route_id' || ($field->getName() === 'delay' && $field->getNumber() === 1)) && $values !== null) {
+        if (($field->getName() === 'incrementality' || ($field->getName() === 'delay' && $field->getNumber() === 1)) && $values !== null) {
             return true;
         }