WBS Element - Infotype 27

Hi everyone,

I'm having an problem with IT 27: I need to know where (wich table) is it saved the information about WBS element because I have users that have an old Master Cost Center on IT27. when I create a new one on that IT, it appears the new one; but if I copy the values from the old one, it also takes the old Master Cost Center.

You got any idea about this?

Thanks a lot!

Sebastian.