diff --git a/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php b/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php
index 93b56cc..80b0b29 100644
--- a/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php
+++ b/core/modules/link/src/Plugin/Validation/Constraint/LinkNotExistingInternalConstraintValidator.php
@@ -46,12 +46,12 @@ public function validate($value, Constraint $constraint) {
       }
 
       if ($url->isRouted()) {
-        $allowed = FALSE;
+        $allowed = TRUE;
         try {
           $url->toString();
         }
         catch (RouteNotFoundException $e) {
-          $allowed = TRUE;
+          $allowed = FALSE;
         }
         if (!$allowed) {
           $this->context->addViolation($constraint->message, array('@uri' => LinkWidget::getUriAsDisplayableString($value->uri)));