previous price in Accounting view 1

Hi..

I am having a problem with the previous price(MBEW-STPRV) in material master. I see that this is being displayed in MM03 but is invisible in MM02. i did some configuration changes and this field was enabled. The problem now is that - it is not editable in MM02. i have already configured this is optional field and field selection I am using is ROH. Field selection group 34.

1. Are there any other ways of changing this field.

2. Am i missing something in configuration which makes this field editable or is it standard behavior.

Checked industry sector configuration but not much helpful.

thanks