diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java
index d5c5c1d..6f91e6e 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java
@@ -53,7 +53,6 @@ public class ActiviteResource {
             System.out.println("ROLE TEST " + hackathon.FrisbYEE.jpa.metier.Role.coach);
             Session session = sessionDAO.findById(dto.getSessionId()).get();
             Activite activite = mapToEntity(dto);
-            activite.setId(null);
             activite.setSession(session);
             activiteDAO.save(activite);
         } catch (Exception ex) {
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/AdminResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/AdminResource.java
index 6ac63b9..f06be02 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/AdminResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/AdminResource.java
@@ -30,7 +30,6 @@ public class AdminResource {
     @PreAuthorize("hasRole('Admin')") // Only admin can create
     public ResponseEntity<AdminDTO> create(@RequestBody AdminDTO dto) {
         Admin admin = mapToEntity(dto);
-        admin.setId(null);
         if(adminDAO.findByKeycloakId(admin.getKeycloakId()).isPresent()) {
             return ResponseEntity.status(200).body(mapToDTO(adminDAO.findByKeycloakId(admin.getKeycloakId()).get()));
         }
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
index ae5cf4b..0e4b0b8 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
@@ -50,7 +50,6 @@ public class AthleteResource {
     @PreAuthorize("hasRole('admin') or hasRole('coach') or hasRole('athlete')")
     public ResponseEntity<AthleteDTO> create(@RequestBody AthleteDTO dto) {
         Athlete athlete = mapToEntity(dto);
-        athlete.setId(null);
         if(athleteDAO.existsByKeycloakId(athlete.getKeycloakId())) {
             return ResponseEntity.status(200).body(mapToDTO(athleteDAO.findByKeycloakId(athlete.getKeycloakId()).get()));
         }
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/CoachResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/CoachResource.java
index 5b34f03..6e22191 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/CoachResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/CoachResource.java
@@ -24,7 +24,6 @@ public class CoachResource {
     @PreAuthorize("hasRole('Admin')") // Only admin can create
     public ResponseEntity<CoachDTO> create(@RequestBody CoachDTO dto) {
         Coach coach = mapToEntity(dto);
-        coach.setId(null);
         if(coachDAO.existsByKeycloakId(coach.getKeycloakId())) {
             return ResponseEntity.status(200).body(mapToDTO(coachDAO.findByKeycloakId(coach.getKeycloakId()).get()));
         }
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java
index 9440eb7..bab9ca9 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java
@@ -45,7 +45,6 @@ public class SessionResource {
     public ResponseEntity<?> create(@RequestBody SessionDTO dto) {
         try {
             Session session = maptoEntity(dto);
-            session.setId(null);
             if(sessionDAO.findById(session.getId()).isPresent()) {
                 return ResponseEntity.status(HttpStatus.OK).body("Session with ID " + session.getId() + " already exists.");