Characteristics value

When i try to do an internal order settlement i am getting the following message anybody come across with this message? Could anyone provide some help on it please.

Characteristic value D does not exist for characteristic WW004 (Sales Channel)

Message no. KE0C133

Diagnosis

The characteristic "WW004" ("Sales Channel") should be posted to Profitability Analysis (CO-PA). When the system checked the entries, it was established that the transferred characteristic value (" D") is not valid in CO-PA.

System Response

The data is not consistent and therefore cannot be transferred to CO-PA.

Procedure

With the function Maintain Characteristic Values, you can add characteristic values to those that are valid.

Thank you