my flutter put request snot working and returning the same exact values

Question

Hi i m new to flutter and i using REST api in my flutter project the get and post request are working properly but the put request dosent i want to change data of a demande but whenever i edit and do some changes then tap on the submit button nothing happens and it prints the same old demande with the old values if anyone can help

import '../Classes/demandes.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import '../Classes/assets.dart';
import 'dart:convert';

class demandeSR extends StatefulWidget {
  @override
  _demande createState() => _demande();
}

Future<Demandes?> submitData(
    String description, ASSETNUM, location, DESCRIPTION_LONGDESCRIPTION) async {
  var respone = await http.post(
      Uri.parse(
          'http://192.168.1.30:9080/maxrest/rest/mbo/sr/?_lid=azizl&_lpwd=max12345m&_format=json'),
      body: {
        "description": description,
        "ASSETNUM": ASSETNUM,
        "location": location,
        "DESCRIPTION_LONGDESCRIPTION": DESCRIPTION_LONGDESCRIPTION,
      });
  var data = respone.body;
  print(data);
  if (respone.statusCode == 200) {
    dynamic responseString = respone.body;
    azizFromJson(responseString);
  } else
    return null;
  return null;
}

class _demande extends State<demandeSR> {
  late Demandes? _demandes;
  TextEditingController descriptionController = TextEditingController();
  TextEditingController ASSETNUMController = TextEditingController();
  TextEditingController locationController = TextEditingController();
  TextEditingController DESCRIPTION_LONGDESCRIPTIONController =
      TextEditingController();

  Widget DescriptionTextField() {
    return TextField(
      decoration: InputDecoration(
        // labelText: "Description",
        border: OutlineInputBorder(borderRadius: BorderRadius.circular(10)),
      ),
      controller: descriptionController,
    );
  }

  Widget AssetTextField() {
    return TextField(
      decoration: InputDecoration(
        //   labelText: "Asset",
        border: OutlineInputBorder(),
      ),
      maxLines: 10,
      controller: ASSETNUMController,
    );
  }

  Widget DeatialsTextField() {
    return TextField(
      decoration: InputDecoration(
        //  labelText: "Details",
        border: OutlineInputBorder(),
      ),
      controller: DESCRIPTION_LONGDESCRIPTIONController,
    );
  }

  Widget LocationTextField() {
    return TextField(
      decoration: InputDecoration(
        //  labelText: "Location",
        border: OutlineInputBorder(),
      ),
      controller: locationController,
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: Text('Creation Demande de service')),
        body: ListView(
          padding: EdgeInsets.all(8),

          // ignore: prefer_const_literals_to_create_immutables
          children: [
            ListTile(
              title: Text("Description"),
            ),
            DescriptionTextField(),
            ListTile(
              title: Text("Details"),
            ),
            DeatialsTextField(),
            ListTile(title: Text("Asset")),
            AssetTextField(),
            ListTile(
              title: Text("Location"),
            ),
            LocationTextField(),
            ElevatedButton(
                onPressed: (() async {
                  String description = descriptionController.text;
                  String ASSETNUM = ASSETNUMController.text;
                  String location = locationController.text;
                  String DESCRIPTION_LONGDESCRIPTION =
                      DESCRIPTION_LONGDESCRIPTIONController.text;
                  Demandes? data = await submitData(description, ASSETNUM,
                      location, DESCRIPTION_LONGDESCRIPTION);
                  setState(() {
                    _demandes = data;
                  });
                }),
                child: Text("submit "))
          ],
        ));
  }
}