No actually am seeing this in Development system.
CS02 T code is for change materials of BOM.
Opened with one material number and selected the Item Icon(F7)
Change Material BOM:Item: All data
In this screen under status/Lng Text tab below is there as
1.Engineering/design
2.Production relevant
In this which Production relevant is grayed out.
Previously we were able to check and and uncheck the box.
But now its grayed out, our requirement is to make it visible.