Firebase Query Error: hasInequality == field': All where filters with an inequality (<, <=, >, or >=) must be on the same field

I am trying to perform a Query but i keep getting this error which i did not understand.

i am trying to perform a complex query

hasInequality == field': All where filters with an inequality (<, <=, >, or >=) must be on the same field. But you have inequality filters on 'FieldPath([ageFrom])' and 'FieldPath([toAge]).

here is my code:

    Future<List<DiscoverUserModel>> getListOfUserData() async {
        List<DiscoverUserModel> usersData = [];
        try {
          final value =
              await firestore.collection("users").doc(auth.currentUser.uid).get();
          final element1 = value.data();
          print('============> $element1');
          var ageFrom = element1['Type']['Age']['ageFrom'];
          var toAge = element1['Type']['Age']['toAge'];
          var distanceFrom = element1['Type']['Distance']['distranceFrom'];
          var distanceTo = element1['Type']['Distance']['distanceTo'];
          print('===========> $ageFrom');
          print('==========> $toAge');
          print('=========> $distanceFrom');
          print('========> $distanceTo');
          if (ageFrom == '18.0' && distanceFrom == '0.0') {
            await firestore.collection("users").get().then((value) {
              value.docs.forEach((element) {
                // print('resulting: ${element.data()['bio']}');
                DiscoverUserModel discoverUserModel = DiscoverUserModel(
                    '${element.data()['name']}',
                    '${element.data()['email']}',
                    '${element.data()['phoneNumber']}',
                    '${element.data()['profilePictureUrl']}',
                    id: element.data()['id'].toString(),
                    bio: element.data()['bio'].toString(),
                    gender: element.data()['gender'].toString());
                usersData.add(discoverUserModel);
                usersData
                    .removeWhere((element) => element.id == auth.currentUser.uid);
                return usersData;
              });
            });
          } else {

//this query is where i am getting the error ........... from here...
            await firestore
                .collection('users')
                .where('ageFrom', isGreaterThanOrEqualTo: ageFrom)
                .where('toAge', isLessThanOrEqualTo: toAge)
                .where('distanceTo', isLessThanOrEqualTo: distanceTo)
                .where('distranceFrom', isGreaterThanOrEqualTo: distanceFrom)
                .get()
                .then(
                  (value1) => value1.docs.forEach((element) {
                    print('========ele==>$element');
                    DiscoverUserModel discoverUserModel = DiscoverUserModel(
                      '${element.data()['name']}',
                      '${element.data()['email']}',
                      '${element.data()['phoneNumber']}',
                      '${element.data()['profilePictureUrl']}',
                      id: element.data()['id'].toString(),
                      bio: element.data()['bio'].toString(),
                      gender: element.data()['gender'].toString(),
                    );
                    usersData.add(discoverUserModel);
                    usersData.removeWhere(
                        (element) => element.id == auth.currentUser.uid);
                    return usersData;
                  }),
                );
          }
    
          return usersData;
        } catch (e) {
          print(e.toString());
          return null;
        }
      }

I don't want to create the index from the console myself because is not good way..