SAP Message BK653 - Entry K-BELEG & 999 already exists, & not inserted

Diagnosis
Conversion program RKTRWPRX tried to insert function module &V2& intable TRWPR. The entry should be given the key "K-BELEG" &V1& 999.However, this key has already been issued in your system with key"K-BELEG1" &V1& &V3& or "K-BELEG2" &V1& &V3&.

System Response
The system does not enter module &V2& for business transaction K-BELEGwith time &V1&.
You should resolve this problem before you make any Controllingpostings in the productive system.
The result of the missing entry in TRWPR, is that module &V4& cannot berun. It is therefore impossible to carry out user-checks or tomanipulate data that is to be posted.

Procedure
Check the contents of table TRWPR. The entries for businesstransactions K-BELEG1 and K-BELEG2 are no longer valid. They have beenreplaced by entries for business transaction K-BELEG. If required, youcan manually enter module &V2& in the appropriate position.
You should discuss the exact position with the originator of the entryunder business transaction K-Beleg1 or K-Beleg2, as the sequence ofthe modules to be processed can be of importance.
To modify the entry, call up transaction SM31, enter table TRWPR andchoose "Maintain". In the table you can find the user-defined entriesfor business transactions K-BELEG1 and K-BELEG2. You can also see whatXPRA has already inserted for K-BELEG.