Exception was thrown when I used multiple PopupMarkerLayers about flutter_map_marker_popup HOT 10 CLOSED

import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_map_marker_popup/flutter_map_marker_popup.dart';
import 'package:latlong2/latlong.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  MyApp({super.key});

  final _controller = PopupController();

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: Scaffold(
        body: FlutterMap(
          options: const MapOptions(
            initialZoom: 1,
          ),
          children: [
            TileLayer(
              urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
              userAgentPackageName: 'flutter_map_marker_popup',
            ),
            PopupMarkerLayer(options: _popupMarkerLayerFor(["qwe", "asd"])),
            PopupMarkerLayer(options: _popupMarkerLayerFor(["hjk", "jkl"])),
          ],
        ),
        ),
      );
  }

  PopupMarkerLayerOptions _popupMarkerLayerFor(List<String> list) {
    return PopupMarkerLayerOptions(
      markers: list.map((e) => Marker(point: LatLng(e.hashCode % 90, e.hashCode % 180), child: Text(e))).toList(),
      markerTapBehavior: MarkerTapBehavior.togglePopupAndHideRest(),
      markerCenterAnimation: const MarkerCenterAnimation(),
      popupController: _controller,
      popupDisplayOptions: PopupDisplayOptions(
        builder: (context, Marker marker) {
          return Card(
            child: marker.child,
          );
        },
      ),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:flutter_map/flutter_map.dart';
import 'package:flutter_map_marker_popup/flutter_map_marker_popup.dart';
import 'package:latlong2/latlong.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  MyApp({super.key});

  final PopupController _popupController = PopupController();

  static final List<LatLng> _markersA = [
    const LatLng(44.421, 10.404),
    const LatLng(45.683, 10.839),
    const LatLng(45.246, 5.783),
  ];
  static final List<LatLng> _markersB = [
    const LatLng(39.421, 10.404),
    const LatLng(40.683, 10.839),
    const LatLng(40.246, 5.783),
  ];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: Scaffold(
        body: PopupScope(
          popupController: _popupController,
          onPopupEvent: (event, selectedMarkers) {
            debugPrint('$event: $selectedMarkers');
          },
          child: FlutterMap(
            options: const MapOptions(
              initialCenter: LatLng(42.5, 10.51),
              initialZoom: 6.0,
            ),
            children: [
              TileLayer(
                urlTemplate: 'https://tile.openstreetmap.org/{z}/{x}/{y}.png',
                userAgentPackageName: 'flutter_map_marker_popup',
              ),
              PopupMarkerLayer(options: _popupMarkerLayerFor(_markersA)),
              PopupMarkerLayer(options: _popupMarkerLayerFor(_markersB)),
              PopupLayer(
                popupDisplayOptions: PopupDisplayOptions(
                    builder: (BuildContext context, Marker marker) {
                  return Card(
                    color: Colors.white,
                    child: Padding(
                      padding: const EdgeInsets.all(10),
                      child: GestureDetector(
                        onTap: () => debugPrint('Popup tap!'),
                        child: const Text(
                          'Container popup for marker',
                        ),
                      ),
                    ),
                  );
                }),
              ),
            ],
          ),
        ),
      ),
    );
  }

  PopupMarkerLayerOptions _popupMarkerLayerFor(List<LatLng> list) {
    return PopupMarkerLayerOptions(
      markers: list.map((latLng) {
        return Marker(point: latLng, child: const Icon(Icons.pin_drop));
      }).toList(),
      markerTapBehavior: MarkerTapBehavior.togglePopupAndHideRest(),
      markerCenterAnimation: const MarkerCenterAnimation(),
      popupController: _popupController,
      /*
      // Enabling this will throw an exception:
      // Multiple widgets used the same GlobalKey.
      popupDisplayOptions: PopupDisplayOptions(
       builder: (context, Marker marker) {
         return Card(
           child: marker.child,
         );
       },
      ),
      */
    );
  }
}