remove() from list impact the list got it by provider! [flutter]

Question

I created a local variable list in a function like this :

 List<FirestoreUser> _members = [];
     _members = Provider.of<GroupsData>(context, listen: false)
              .members(widget.groupID!);

then I created a listview to display the list :

ListView.builder(
                            shrinkWrap: true, 
                            primary: false, 
                            itemCount: _members.length,
                            itemBuilder: (context, index) {
                              return ListTile(
                                title: Text(_members[index].name),
                                trailing: IconButton(
                                    onPressed: () {
                                      setState(() {                                            
                                        print("before remove :" +
                                            Provider.of<GroupsData>(context,
                                                    listen: false)
                                                .members(widget.groupID!)
                                                .toString());
                                        _members.removeAt(index);
                                        print("After remove :" +
                                            Provider.of<GroupsData>(context,
                                                    listen: false)
                                                .members(widget.groupID!)
                                                .toString());
                                      });
                                    },
                                    icon: Icon(Icons.delete)),
                              );
                            },
                          ),

but when I tried to remove an item from the variable list "_members" the item get deleted also from the list in groupData from the provider

Thanks for helping!