When registering on the site through the application, it gives an error Failure to register?

Question

Java

When registering on the site through the application, it gives an error Failure to register. What is the reason? Login works fine!

/** Enregistrement d'un utilisateur **/
    private class createUser extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... params) {
            String url = global_url+"user_register.php";
            StringRequest jsonObjReq = new StringRequest(Request.Method.POST,
                    url,
                    new Response.Listener<String>() {

                        @Override
                        public void onResponse(String response) {
                            try {
                                progressBar_subs.setVisibility(View.INVISIBLE);
                                JSONObject json = new JSONObject(response);
                                JSONObject msg = json.getJSONObject("msg");
                                String etat = msg.getString("etat");
                                if(etat.equals("1")){
                                    JSONObject user = json.getJSONObject("user");

                                    phone_subs.setText("");
                                    password_subs.setText("");
                                    password_conf.setText("");
                                    firstname_subs.setText("");
                                    email_insc.setText("");
//                                    Toast.makeText(context, "Successfully completed", Toast.LENGTH_SHORT).show();

                                    if(account_type.equals("customer")){
                                        saveProfile(new User(user.getString("id"),user.getString("nom"),user.getString("prenom"),user.getString("phone")
                                                ,user.getString("email"),user.getString("statut"),user.getString("login_type"),user.getString("tonotify"),user.getString("device_id"),
                                                user.getString("fcm_id"),user.getString("creer"),user.getString("modifier"),user.getString("photo_path"),user.getString("user_cat"),"",user.getString("currency")
                                                ,"","" ,"","","","","",user.getString("country")));
                                    }else{
                                        id_driver = user.getString("id");
                                        saveProfile(new User(user.getString("id"),user.getString("nom"),user.getString("prenom"),user.getString("phone")
                                                ,user.getString("email"),user.getString("statut"),user.getString("login_type"),user.getString("tonotify"),user.getString("device_id"),
                                                user.getString("fcm_id"),user.getString("creer"),user.getString("modifier"),user.getString("photo_path"),user.getString("user_cat"),"",user.getString("currency")
                                                ,user.getString("statut_licence"),user.getString("statut_nic"),"","","","",user.getString("statut_vehicule"),user.getString("country")));
                                    }

//                                    phone_subs.setText(phone);
//                                    Connexion.input_phone.setText(user.getString("phone"));
                                    launchHomeScreen();
                                }else if(etat.equals("2")){
                                    Toast.makeText(context, "This number already exists", Toast.LENGTH_SHORT).show();
                                    requestFocus(phone_subs);
                                    input_layout_phone_subs.setError("Enter another phone number");
                                }else
                                    Toast.makeText(context, "Failure to register", Toast.LENGTH_SHORT).show();

                            } catch (JSONException e) {

                            }
                        }
                    }, new Response.ErrorListener() {

                @Override
                public void onErrorResponse(VolleyError error) {
                    progressBar_subs.setVisibility(View.INVISIBLE);
                    Toast.makeText(context, "Error "+error.getMessage(), Toast.LENGTH_SHORT).show();
                }
            }) {

                @Override
                protected Map<String, String> getParams() {
                    Map<String, String> params = new HashMap<String, String>();
                    params.put("firstname", val_firstname_subs);
                    params.put("phone", val_phone_subs);
                    params.put("password", val_password_subs);
                    params.put("email", val_email_subs);
                    params.put("account_type", account_type);
                    params.put("login_type", "phone");
                    params.put("tonotify", "yes");
                    return params;
                }

            };

The problem is that etat does not return 1 and 2 but returns 3

Here is the php code that returns 3

else {
                    $insertdata = mysqli_query($con, "insert into tj_user_app(prenom,phone,mdp,statut,login_type,tonotify,creer)
                    values('$prenom','$phone','$mdp','yes','$login_type','$tonotify','$date_heure')");
                    $id = mysqli_insert_id($con);
                    if ($insertdata > 0) {
                        $response['msg']['etat'] = 1;
                        
                        $get_user = mysqli_query($con, "select * from tj_user_app where id=$id");
                        $row = $get_user->fetch_assoc();
                        unset($row['mdp']);
                        $row['user_cat'] = "user_app";
    
                        $get_currency = mysqli_query($con, "select * from tj_currency where statut='yes' limit 1");
                        $row_currency = $get_currency->fetch_assoc();
                        $row['currency'] = $row_currency['symbole'];

                        $get_country = mysqli_query($con, "select * from tj_country where statut='yes' limit 1");
                        $row_country = $get_country->fetch_assoc();
                        $row['country'] = $row_country['code'];

                        // $get_commission = mysqli_query($con, "select * from tj_commission where statut='yes' limit 1");
                        // $row_commission = $get_commission->fetch_assoc();
                        // $row['commission'] = $row_commission['value'];
                        
                        $response['user'] = $row;
                    } else {
                        $response['msg']['etat'] = 3;
                    }