diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Administrator.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Administrator.java
index d90e3aa..fcb4cdb 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Administrator.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Administrator.java
@@ -13,14 +13,14 @@ import java.util.List;
 public class Administrator extends User {
 
     @OneToMany(mappedBy = "projectAdministrator", fetch = FetchType.LAZY, orphanRemoval = true)
-    private List<Project> listProject = new ArrayList<>();
+    private final List<Project> listProject = new ArrayList<>();
 
     /*@OneToMany(mappedBy = "administratorSectionCell", fetch = FetchType.LAZY, orphanRemoval = true)
     private List<SectionCell> listSectionCell = new ArrayList<>();*/
     // should now be useless
 
     @OneToMany(mappedBy = "administratorAnnotation", fetch = FetchType.LAZY, orphanRemoval = true)
-    private List<Annotation> listAnnotation = new ArrayList<>();
+    private final List<Annotation> listAnnotation = new ArrayList<>();
 
     /*@OneToMany(mappedBy = "administratorAppointment", fetch = FetchType.LAZY, orphanRemoval = true)
     private final List<Appointment> listAppointment = new ArrayList<>();*/
@@ -32,12 +32,11 @@ public class Administrator extends User {
     public Administrator() {}
 
     public Administrator(
-            Long idUser,
             String userSurname,
             String username,
             String mainMail,
             String secondaryMail,
             String phoneNumber) {
-        super(idUser, userSurname, username, mainMail, secondaryMail, phoneNumber);
+        super(null, userSurname, username, mainMail, secondaryMail, phoneNumber);
     }
 }
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Annotation.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Annotation.java
index fa73e0d..a7ba0d8 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Annotation.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Annotation.java
@@ -1,14 +1,12 @@
 package enseirb.myinpulse.model;
 
 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
 
 @Entity
 @Table(name = "annotation")
 public class Annotation {
 
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idAnnotation;
 
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Appointment.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Appointment.java
index 67c0fd9..1540e39 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Appointment.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Appointment.java
@@ -1,7 +1,6 @@
 package enseirb.myinpulse.model;
 
 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
 
 import java.time.LocalDate;
 import java.time.LocalTime;
@@ -17,9 +16,6 @@ public class Appointment {
             new ArrayList<>(); */
     // should now be useless
 
-    @OneToOne(mappedBy = "appointmentReport", fetch = FetchType.LAZY, orphanRemoval = true)
-    private Report report;
-
     @ManyToMany(
             fetch = FetchType.LAZY,
             cascade = {CascadeType.ALL})
@@ -28,9 +24,9 @@ public class Appointment {
             joinColumns = @JoinColumn(name = "idAppointment"),
             inverseJoinColumns = @JoinColumn(name = "idSectionCell"))
     List<SectionCell> listSectionCell = new ArrayList<>();
-
+    @OneToOne(mappedBy = "appointmentReport", fetch = FetchType.LAZY, orphanRemoval = true)
+    private Report report;
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idAppointment;
 
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/MakeAppointment.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/MakeAppointment.java
index 91c97d5..aae4f18 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/MakeAppointment.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/MakeAppointment.java
@@ -1,14 +1,12 @@
 package enseirb.myinpulse.model;
 
 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
 
 @Entity
 @Table(name = "make_appointment")
 public class MakeAppointment {
 
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idMakeAppointment;
 
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Project.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Project.java
index 070efc6..38392c0 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Project.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Project.java
@@ -1,7 +1,6 @@
 package enseirb.myinpulse.model;
 
 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
 
 import java.time.LocalDate;
 import java.util.ArrayList;
@@ -18,7 +17,6 @@ public class Project {
     private final List<SectionCell> listSectionCell = new ArrayList<>();
 
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idProject;
 
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Report.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Report.java
index 5ff5e82..055b134 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Report.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/Report.java
@@ -4,14 +4,12 @@ import jakarta.persistence.*;
 import jakarta.persistence.Entity;
 import jakarta.persistence.Id;
 import jakarta.persistence.Table;
-import jakarta.validation.constraints.NotNull;
 
 @Entity
 @Table(name = "report")
 public class Report {
 
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idReport;
 
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/SectionCell.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/SectionCell.java
index d77faf6..0fb8c89 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/SectionCell.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/SectionCell.java
@@ -1,7 +1,6 @@
 package enseirb.myinpulse.model;
 
 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
 
 import java.time.LocalDateTime;
 import java.util.ArrayList;
@@ -18,7 +17,6 @@ public class SectionCell {
     private final List<Annotation> listAnnotation = new ArrayList<>();
 
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idSectionCell;
 
diff --git a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/User.java b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/User.java
index c23b285..8dbe4e8 100644
--- a/MyINPulse-back/src/main/java/enseirb/myinpulse/model/User.java
+++ b/MyINPulse-back/src/main/java/enseirb/myinpulse/model/User.java
@@ -1,7 +1,6 @@
 package enseirb.myinpulse.model;
 
 import jakarta.persistence.*;
-import jakarta.validation.constraints.NotNull;
 
 @Entity
 @Table(name = "user_inpulse")
@@ -9,7 +8,6 @@ import jakarta.validation.constraints.NotNull;
 public class User {
 
     @Id
-    @NotNull
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long idUser;