SAP Message VAL807 - Impairment value for loan contract &3 not found on key date &1

Diagnosis
You want to record an impairment for a position. An impairment valuemust be defined in the system for the position.
The system was unable to determine an impairment value for key date &V1&
. This refers to loan contract &V3& in company code &V2&.

System Response
Processing is terminated.

Procedure
Enter an impairment value in the system using the transaction EnterPrices/Net Present Values for Special Valuation (TPM73)