R47121 Error on Dates

I get the error when running R47121.

Where is the date to be corrected?

Subject       : Error: Sell By Date incorrect

CAUSE . . . . . . . . . The Sell By Date must be greater than or equal to the Lot Effective Date and less than or equal to the Lot Expiration Date.

RESOLUTION  . . . Enter a Sell By Date that is greater than or equal to the Lot Effective Date and less than or equal to the Lot Expiration Date.