there I'm trying to make this kind of a function, Where if the first field changes value the second field should be null

I have this

            start: Yup.date()
                .max(new Date(), 'startDateCannotBeHigher')
                .required('pleaseWriteStartDate'),
            end: Yup.date().when(start, {
                is: (start) => start,
                then: Yup.date()
                    .when(
                        'start',
                        (start, schema) =>
                            start &&
                            schema.min(
                                new Date(new Date(start).setFullYear(new Date(start).getFullYear() + 1)),
                                'endDateCannotBeSameAsStartDate'
                            )
                    )
                    .required('pleaseWriteEndDate'),
            }),

So when the start field is changed, I want the end to be null.

Thanks a lot