It sounds like you may have accidentally started to enter a 1099-R. To fix this message, just delete the 1099-R. Here's how to access it:

1. Open (continue) return if you don't already have it open.
2. Inside TurboTax, search for 1099-R and select the Jump to link in the search results.

I had the same problem. I found two "untitled 1099-R" listed under 1099-R  in the "Income" section.  Guess they were accidentally entered by me. Anyway, after I deleted them, things proceeded smoothly.