How to automatically add a dummy member under parent in MD to load the actuals of the parent while loading the MD from BW infoprovider?

Hello BPC Gurus

   I am trying to load the actual from BW info provider. The DMP run with Warning as status message. There were some rejected records when drilled down I found that there are actuals at parent level captured in ECC. To overcome this issue a dummy member has to be added below the parent level of each WBS Parent member i.e. R_FR01_01 should have a dummy member R_FR01_01_DM.  I want this to automate while loading the MD from BW to BPC. As in future the client may add n number of WBS set in real time.

    Can you please advice me on how to do this? Is this has to be done at Transformation > Mapping or at Conversion file.

Look at the WBS structure:

Regards

KMG