After updating I got these error messages After updating my Drupal 8 test site from 8.3.7 to 8.4.0, I got these error messages:


  Mismatched entity and/or field definitions
  The following changes were detected in the entity type and field definitions.
  
  Webform submission
  
  
  The Sprache field needs to be updated.
  
  
  Absatz
  
  
  The Veröffentlicht field needs to be updated.
  The Behavior settings field needs to be updated.
  


What do I have to do? I don't know how and where I should update these fields. Should I update any database table, or is there another workaround?
Try on terminal this command 


drush entity-updates


Or if you have Devel module installed, you can also use the "Execute PHP Code" page at http;//example.com/devel/php


try {
  \Drupal::entityDefinitionUpdateManager()->applyUpdates();
}
catch (EntityStorageException $e) {
  print_r($e);
}