Generate g.dart file failed

[manhpv-1697]

I'm using build_value_generator 8.4.1, but when i run flutter packages pub run build_runner build --delete-conflicting-outputs, i receive error : "[SEVERE] built_value_generator:built_value on lib/state/app_state.dart (cached):
Error in BuiltValueGenerator for abstract class AppState implements Built<AppState, AppStateBuilder>, HostState, ClientState, StateWithNavigation.
Please make the following changes to use BuiltValue:

1. Make builder field navigation a normal field or a getter/setter pair.
   "

This is my code:
part 'app_state.g.dart';

abstract class AppState
implements
Built<AppState, AppStateBuilder>,
HostState,
ClientState,
StateWithNavigation {
AppState._();

factory AppState() = _$AppState;

static Serializer get serializer => _$appStateSerializer;

@BuiltValueField(serialize: false)
int get shieldCounter;

@OverRide
@BuiltValueField(serialize: false)
NavigationState get navigation;

@OverRide
Settings get settings;

bool get isPro;

@BuiltValueField(serialize: false)
String get languageCode;

String get webViewUrl {
final gameId = currentGame?.gameId;
return gameId == null
? ""
: '';
}

bool get isFirstRun;

@BuiltValueField(serialize: false)
bool get linkSubscriptionHasStarted;

@BuiltValueField(serialize: false)
Offering? get offering;

@OverRide
bool get isCreatingGame;

bool get showHeader;
}

abstract class AppStateBuilder
implements
Builder<AppState, AppStateBuilder>,
CommonStateBuilder,
HostStateBuilder,
ClientStateBuilder,
StateWithNavigationBuilder {
AppStateBuilder._();

factory AppStateBuilder() = _$AppStateBuilder;

@OverRide
void replace(covariant AppState other);

@OverRide
bool isCreatingGame = false;
int shieldCounter = 0;
bool showHeader = false;
bool isFirstRun = true;
bool isPro = false;
bool linkSubscriptionHasStarted = false;

String languageCode = window.locale.languageCode;

@OverRide
SettingsBuilder settings = SettingsBuilder();
Offering? offering;

@OverRide
String userId = "";
@OverRide
CurrentGameBuilder currentGame = CurrentGameBuilder();

@OverRide
NavigationStateBuilder get navigation => NavigationStateBuilder()
..stacks![Navigators.main] =
RouteStack((b) => b..stack.add(const AppSetupRoute()))
..stacks![Navigators.popups] = RouteStack();
}