مشكلة تكرار الملفات المرفوعه في قاعدة البيانات flutter

السلام عليكم ورحمة الله وبركاته

تحيه طيبه للجميع

قمت بعمل كود يجلب الصور من الاستوديو للمستخدم ثم يستطيع المستخدم رفعها الى قاعدة البيانات mysql  من خلال تطبيق فلاتر

الكود شغال تمام ولكن توجد مشكله واحده في حالة قمت بتحميل صوره واحده الكود شغال كويس ولكن لو قمت باختيار مثلا صورتان او اكثر وقمت برفعها الى قاعدة البيانات يتم تكرار الاسم في قاعدة البيانات او تكرار الحقول اكثر من عدد الصور المرفوعه 

مثال انا قمت بتجربة تحميل صورتان 

وهذا النتيجة التي حصلت عليها :

تقريبا 6 اسطر والمتفرض يكون فقط اثنان

واحصل ذلك على الخطاء التالي في الاندرويد ستوديو :

Performing hot reload...
Syncing files to device SM G955F...
Reloaded 1 of 613 libraries in 963ms.
D/ViewRootImpl@eb7fe80[MainActivity]( 7240): ViewPostIme pointer 0
D/ViewRootImpl@eb7fe80[MainActivity]( 7240): ViewPostIme pointer 1
I/flutter ( 7240): dddddddddddddddd 200
I/flutter ( 7240): dddddddddddddddd 200
I/flutter ( 7240): dddddddddddddddd 200
I/flutter ( 7240): dddddddddddddddd 200
I/flutter ( 7240): dddddddddddddddd 200
I/flutter ( 7240): dddddddddddddddd 200
E/flutter ( 7240): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: RangeError (index): Invalid value: Not in inclusive range 0..5: 6
E/flutter ( 7240): #0      List.[] (dart:core-patch/growable_array.dart:177:60)
E/flutter ( 7240): #1      _PickImagesState.startUpload (package:multiiamge/testpage.dart:91:27)
E/flutter ( 7240): <asynchronous suspension>
E/flutter ( 7240): #2      _PickImagesState.build.<anonymous closure> (package:multiiamge/testpage.dart:218:15)
E/flutter ( 7240): #3      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:993:19)
E/flutter ( 7240): #4      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:1111:38)
E/flutter ( 7240): #5      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:183:24)
E/flutter ( 7240): #6      TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:598:11)
E/flutter ( 7240): #7      BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:287:5)
E/flutter ( 7240): #8      BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:222:7)
E/flutter ( 7240): #9      PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:476:9)
E/flutter ( 7240): #10     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:77:12)
E/flutter ( 7240): #11     PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:122:9)
E/flutter ( 7240): #12     _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:377:8)
E/flutter ( 7240): #13     PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:120:18)
E/flutter ( 7240): #14     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:106:7)
E/flutter ( 7240): #15     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:358:19)
E/flutter ( 7240): #16     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:338:22)
E/flutter ( 7240): #17     RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:267:11)
E/flutter ( 7240): #18     GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:295:7)
E/flutter ( 7240): #19     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:240:7)
E/flutter ( 7240): #20     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:213:7)
E/flutter ( 7240): #21     _rootRunUnary (dart:async/zone.dart:1206:13)
E/flutter ( 7240): #22     _CustomZone.runUnary (dart:async/zone.dart:1100:19)
E/flutter ( 7240): #23     _CustomZone.runUnaryGuarded (dart:async/zone.dart:1005:7)
E/flutter ( 7240): #24     _invoke1 (dart:ui/hooks.dart:265:10)
E/flutter ( 7240): #25     _dispatchPointerDataPacket (dart:ui/hooks.dart:174:5)
E/flutter ( 7240): 

الكود كامل كالتالي:

void main() {
  runApp(
    MyApp(),

  );
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: '',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: PickImages(),
    );
  }
}
class PickImages extends StatefulWidget {
  @override
  _PickImagesState createState() => _PickImagesState();
}

class _PickImagesState extends State<PickImages> {
  static final String uploadEndPoint = 'https://******************.php';
  List<Object> images = List<Object>();
  Future<File> _imageFile;
  bool _isVisible = false;
  String base64Image;
  List imagecode=[];
  List name=[];
  Future _onAddImageClick(int index, int type) async {
    if (images != null)
      setState(() {
        // ignore: deprecated_member_use
        _imageFile = ImagePicker.pickImage(
          source: type == 1 ? ImageSource.camera : ImageSource.gallery,
          imageQuality: 50,
        );
        getFileImage(index);
      });
  }

  void getFileImage(int index) async {
    _imageFile.then((file) async {
      setState(() {
        ImageUploadModel imageUpload = new ImageUploadModel();
        imageUpload.imageFile = file;
        images.replaceRange(index, index + 1, [imageUpload]);
      });
    });
  }

  void showImageBox() {
    setState(() {
      _isVisible = !_isVisible;
    });
  }

  @override
  void initState() {
    super.initState();
    setState(() {
      images.add("Add Image");
      images.add("Add Image");
      images.add("Add Image");
      images.add("Add Image");
      images.add("Add Image");
      images.add("Add Image");
    });
  }


  startUpload() async{
    String NameImage = DateTime.now().millisecondsSinceEpoch.toString();
    {for(int i=0;i<=imagecode.length;i++){
      await http.post(uploadEndPoint, body: {
        "image": imagecode[i],
        "NameImage": name[i],

      }).then((result) {
        if (result.statusCode == 200) {
          print('dddddddddddddddd ${result.statusCode}');
        } else {

        }
      });
    }}
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Post Images'),
      ),
      body: Column(
        children: <Widget>[
          Container(
            //padding: EdgeInsets.only(right: 5),
            child: Card(
              elevation: 5,
              child: ListTile(
                trailing: Icon(Icons.attachment),
                title: Text('Attachments'),
                onTap: () {
                  showImageBox();
                },
              ),
            ),
          ),
          Visibility(
            visible: _isVisible,
            child: Padding(
              padding: const EdgeInsets.only(top: 5.0, right: 5.0),
              child: GridView.count(
                shrinkWrap: true,
                crossAxisCount: 3,
                childAspectRatio: 1,
                children: List.generate(images.length, (index) {
                  if (images[index] is ImageUploadModel) {
                    ImageUploadModel uploadModel = images[index];
                    //base64 image
                    List<int> imageBytes = uploadModel.imageFile.readAsBytesSync();
                    // base64Image = base64Encode(snapshot.data.readAsBytesSync());
                    base64Image = base64Encode(imageBytes); //'base64Image' holds the base64 image string
                    imagecode.add(base64Image);
                    name.add(uploadModel.imageFile.path.split("/").last);
                    return Card(
                      clipBehavior: Clip.antiAlias,
                      child: Stack(
                        children: <Widget>[
                          Image.file(
                            uploadModel.imageFile,
                            fit: BoxFit.cover,
                            width: 300,
                            height: 300,
                          ),
                          Positioned(
                            right: 5,
                            top: 5,
                            child: InkWell(
                              child: Icon(
                                Icons.remove_circle,
                                size: 20,
                                color: Colors.red,
                              ),
                              onTap: () {
                                setState(() {
                                  images.replaceRange(
                                      index, index + 1, ['Add Image']);
                                });
                              },
                            ),
                          ),

                        ],
                      ),
                    );
                  } else {
                    return Card(
                      child: IconButton(
                        icon: Icon(Icons.camera_alt),
                        onPressed: () {
                          showModalBottomSheet(
                            context: context,
                            builder: (BuildContext context) {
                              return SafeArea(
                                child: Container(
                                  child: new Wrap(
                                    children: <Widget>[
                                      new ListTile(
                                        leading: new Icon(Icons.photo_camera),
                                        title: new Text('Camera'),
                                        onTap: () {
                                          _onAddImageClick(index, 1);
                                          Navigator.of(context).pop();
                                        },
                                      ),
                                      new ListTile(
                                          leading:
                                          new Icon(Icons.photo_library),
                                          title: new Text('Gallery'),
                                          onTap: () {
                                            _onAddImageClick(index, 2);
                                            Navigator.of(context).pop();
                                          }),
                                    ],
                                  ),
                                ),
                              );
                            },
                          );
                        },
                      ),
                    );
                  }
                }),
              ),
            ),
          ),
          RaisedButton(
            child: Text('send'),
            onPressed: () {
              startUpload();
            },
          ),
        ],
      ),
    );
  }
}

class ImageUploadModel {
  File imageFile;

  ImageUploadModel({
    this.imageFile,
  });
}

ياليت اذا احد يعرف شو السبب يفيدنا بطريقة الحل لها 

شكرا لكم