In this case the SECURE Act changes do not apply because the first beneficiary died prior to 2020. Assuming that the first beneficiary was not the spouse of the original participant, the second beneficiary would simply continue the RMD schedule of the first beneficiary, continuing to reduce the life-expectancy factor by 1 each year. However, the life-expectancy factor for the first beneficiary in 2017 needs to be re-determined using the Single Life Expectancy table that was updated in 2022.
To provide a specific answer requires knowing the year that the original participant was born, the year that the first beneficiary was born and whether the first beneficiary was the spouse of the original participant.
