Asset explorer and WBS

Hi experts,

I have a question concerning asset explorer.

How the WBS element related to asset does appear in the bottom left of the asset explorer screen?

It tried to complete the WBS field (PS_PSP_PNR2 field) at first but it didn't appear in the asset explorer.

Then i have completed the WBS for investment -(AM_POSNR field)-> I have it in my explorer....

But my problem is i don't want to have posting on my otp (even statistical).

Is there a way to add the WBS (PS_PSP_PNR2 field) in the asset explorer?

Thanks a lot for your help,

Chris