Can't save form action

Forms\Components\TextInput::make('remaining_stock')
->disabled()
->suffixAction(
    Action::make('addingNewStock')
        ->label('Add New Stock')
        ->icon('heroicon-m-plus')
        ->requiresConfirmation()
        ->form([
            Forms\Components\TextInput::make('adding_stock')
                ->numeric()
                ->rules(['integer', 'min:0'])
        ])
        ->modalIcon('heroicon-m-plus')
        ->action(function (
            Forms\Set $set, Get $get, array $data
        ): void {
            $set(
                'remaining_stock',
                $get('remaining_stock') + $data['adding_stock']);
        })
)