Tax Year Prior to 2020: Backdoor Roth IRA contribution - 2 1099-R Forms Received

I have 2 1099-Rs for my traditional to Roth backdoor conversion 

 

First 1099-R  with distribution code 2 - make sense since I received distribution from traditional IRA (to convert to Roth)

 

Second 1099-R with distribution code N - this is the one that confuses me. Why did I get the form? I only received distribution once from traditional to convert to Roth, which is shown on the first form above.