Controlling area 1000 already used for organizational unit XXXX when trying to map the cost center using PPOME tcode

Workaround is when we use the expert mode -PP01 ,we will be able to map the cost centre without the system throwing the error.have to check how it behaves in other interfaces like PPOM_OLD. need to check the root cause of issue else raise an OSS and wait to hear it from SAP Thanks to Lobna http://scn.sap.com/message/9369845