SAP Message VAL811 - Position management procedure &1 has invalid position mgmt category

Diagnosis
You want to record an impairment for a position with position managementprocedure &V1&.
An impairment can only be recorded for positions with the positionmanagement category Securities/Loans/Money Market (without index-linkedbonds) or Index-Linked Bonds. This is not the case for positionmanagement procedure &V1&.

System Response
Processing is terminated.

Procedure
Define a valid position management procedure for this position.