Add setMaxResults(1) to assure single result in dupe customer query #116

src/Controller/APIController.php

@@ -233,6 +233,7 @@ class APIController extends Controller
             ->andWhere('s.customer is not null')
             ->andWhere('s.confirm_flag = 1')
             ->setParameter('number', $number)
+            ->setMaxResults(1)
             ->getQuery();
 
         // we just need one