MDG-F Custom field validation

Hello Expert,

I have extended MDG-F data model 0G for GL account with addition custom fields as mandatory field.

I have one change request to Change GL account . Now as I have some old accounts which doesn't have this custom fields have values.

When I trying to create CR with change GL account -> don't change any value -> submit

then this validation doesn't through any error.

Custom mandatory field still doesn't have any data but rules badi doesn't through any error bcoz no data change .

Any notes ? Reason ?

Thanks in advance ,

Varun