diff --git a/src/main/java/fr/univtln/bruno/samples/jaxrs/mappers/GenericExceptionMapper.java b/src/main/java/fr/univtln/bruno/samples/jaxrs/mappers/GenericExceptionMapper.java
index 44a49edefbb286605053d04de642168b9feacc66..6902906eb8f458dba24a1d4034470eee5e4bb148 100755
--- a/src/main/java/fr/univtln/bruno/samples/jaxrs/mappers/GenericExceptionMapper.java
+++ b/src/main/java/fr/univtln/bruno/samples/jaxrs/mappers/GenericExceptionMapper.java
@@ -11,10 +11,8 @@ import lombok.experimental.FieldDefaults;
 @Provider
 @FieldDefaults(level = AccessLevel.PRIVATE)
 public class GenericExceptionMapper implements ExceptionMapper<Exception> {
-    final Response.Status status = Response.Status.INTERNAL_SERVER_ERROR;
-
     public Response toResponse(Exception ex) {
-        return Response.status(status)
+        return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
                 .entity(ex.getMessage())
                 .type(MediaType.APPLICATION_JSON)
                 .build();
diff --git a/src/main/java/fr/univtln/bruno/samples/jaxrs/model/BiblioModel.java b/src/main/java/fr/univtln/bruno/samples/jaxrs/model/BiblioModel.java
index 424306c9103f760ec547e8e66bda4d586ccd06be..9876f7e40d1e79b282b54b14ae9df2c36dbfa192 100644
--- a/src/main/java/fr/univtln/bruno/samples/jaxrs/model/BiblioModel.java
+++ b/src/main/java/fr/univtln/bruno/samples/jaxrs/model/BiblioModel.java
@@ -86,7 +86,7 @@ public class BiblioModel {
 
     public void supprimerAuteurs() {
         auteurs.clear();
-        lastId = 0;
+        lastId.set(0);
     }
 
     public enum Field {NOM, PRENOM, BIOGRAPHIE}