Column not found in symfony mapped

public function buildForm(FormBuilderInterface $builder, array $options): void { $builder

        ->add(child: 'Title')
        ->add('Image', FileType::class, [
            'mapped' => false
        ])

        ->add('save', SubmitType::class, [
            'attr' => [
               
            ]
        ]);
}

As shown above i have stetted the value of mapped to false.But symfony is giving me an error column not found

Trying to add mapped false and i was expecting the field to not be linked to databases

source https://stackoverflow.com/questions/76143062/column-not-found-in-symfony-mapped