The error has to do with a software issue on Form 8606 which has been fixed. To fix the problem on your tax return, please update TurboTax if you are using a desktop version. Then delete your 1099-R forms and reenter them. Once you go through the final review, it should work. 1099-R information, final review and refiled again. It was accepted by IRS.
Here is a TurboTax article about inherited property.
@leopold
