Qualified Business Income Component Worksheet: Aggregation statement must be entered.

When doing the Smart Check at the end of my federal tax return it brings up the following "Check this Entry" item:

 

Qualified Business Income Component wkst (my name): Aggregation changes stmt must be entered.


Aggregation changes stmt:________________

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I have no idea what to enter here. I know that when I was completing the Qualified Business Income questions for my only rental property, it had a pre-filled statement from a previous year, which I did not mess with and left in there. I have no idea if that's the statement, but if so, then it was not left empty.