diff --git a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraintValidator.php b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraintValidator.php
index af2efb6..5fffc37 100644
--- a/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraintValidator.php
+++ b/core/lib/Drupal/Core/Validation/Plugin/Validation/Constraint/AllowedValuesConstraintValidator.php
@@ -21,7 +21,7 @@ class AllowedValuesConstraintValidator extends ChoiceValidator {
    */
   public function validate($value, Constraint $constraint) {
     if ($this->context->getMetadata()->getTypedData() instanceof AllowedValuesInterface) {
-      $allowed_values = $this->context->getMetadata()->getTypedData()->getAllPossibleValues();
+      $allowed_values = $this->context->getMetadata()->getTypedData()->getSettableValues();
       $constraint->choices = $allowed_values;
     }
     return parent::validate($value, $constraint);
diff --git a/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigEntityReferenceItemBase.php b/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigEntityReferenceItemBase.php
index d95a4dd..6f86275 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigEntityReferenceItemBase.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Type/FieldType/ConfigEntityReferenceItemBase.php
@@ -153,7 +153,7 @@ public function instanceSettingsForm(array $form, array &$form_state) {
    *
    * @see \Drupal\Core\TypedData\AllowedValuesInterface
    */
-  public function getOptions() {
+  public function getSettableOptions() {
     $definition = $this->getPluginDefinition();
     $callback = "{$definition['module']}_options_list";
     if (function_exists($callback)) {