src/main/java/fr/titionfire/ffsaf/domain/service/LicenceService.java

@@ -143,6 +143,7 @@ public class LicenceService {
                                         model.setValidate(valid);
                                         return Panache.withTransaction(() -> repository.persist(model));
                                     }
-                                }));
+                                }))
+                .map(__ -> "OK");
     }
 }