Can't delete parts from 3DEXPERIENCE platform

I was trying to delete some old parts from the 3DEXPERIENCE platform that are on "Released" and "Obsolete" maturity phase. But It's not possible to delete them. Searching on the help of the platform I found that is necessary acess to a widget called "Collaborative Spaces Control Center" to change the maturity state of the part, but It doesn't exist for me on the compass. Does anyone have the same problem or have the knowledge to do it?

 

Here is the print of the help explaining how to change the maturity state of a part.

Edu  3DEXPERIENCE 3DSpace