diff --git a/core/modules/comment/src/Entity/Comment.php b/core/modules/comment/src/Entity/Comment.php
index 123ff30..8b24aba 100644
--- a/core/modules/comment/src/Entity/Comment.php
+++ b/core/modules/comment/src/Entity/Comment.php
@@ -280,13 +280,11 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['created'] = BaseFieldDefinition::create('created')
       ->setLabel(t('Created'))
       ->setDescription(t('The time that the comment was created.'))
-      ->setDefaultValue(0)
       ->setTranslatable(TRUE);
 
     $fields['changed'] = BaseFieldDefinition::create('changed')
       ->setLabel(t('Changed'))
       ->setDescription(t('The time that the comment was last edited.'))
-      ->setDefaultValue(0)
       ->setTranslatable(TRUE);
 
     $fields['status'] = BaseFieldDefinition::create('boolean')