SAP Message A5003 - Own logical system &1 not allowed in summarization version &2.

Diagnosis
The system determined that data for your own logical system &V3&, or ahierarchy with your own logical system &V3& are already stored insummarization version &V2&. Therefore, you can enter neither data nor anew hierarchy with the new 'own logical system' &V1& in thissummarization version.

System Response
Processing is not continued.

Procedure
Check your entries. If you want to use &V1& as your new own logicalsystem, then use a new summarization version for storing the data orthe hierarchy.