CA02 Indicator for Relevancy to Costing change to default value after pressing enter

Hi,

In CA02 on operation details --> general data

if I change the Indicator for Relevancy to Costing to a different value from default, after pressing enter, it returns to default value setted for that control key. If I press save button without enter button before, the value is saved.....

I checked in OPCG transaction but all seems to be ok.

Any idea?

Thanks.