Why is Turbo Tax questioning my 1099-R having an amount in box 1 but not in box 2A?

I rolled over a 401k from a previous employer to my current employer's 401k. This resulted in a 1099-R with an amount in box 1, $0 in box 2a and "total distribution" check in 2b. Turbo Tax is stating this doesn't look right and has me confirm this information repeatedly.

Since I was not taxed on the distribution, qualifying plan to qualifying plan, where is the problem?