E-File rejected due to FED_Taxable_Inherited_IRA but I don't even have one

FED_Taxable_Inherited_IRA - There is a potential issue with the calculation of your Taxable Inherited IRA.

 

Turbotax says "There is a potential issue with the calculation of your Taxable Inherited IRA. We are reviewing updates to Taxable Inherited IRA calculations. We expect to have these updates done by March 5th, 2021."

 

OK .. but I don't even have an inherited IRA. I did have a Roth conversion, and I've reviewed forms 1099-R and 8606 and all looks fine. I searched the entire return and found no entries made for any inherited IRA.