Invisible fields in MDM

Hello experts,

I've faced with one problem. MDM main table has around 60 fields. MDM API version is 7.1

All the fields are available via Data Manager and I can see the field properties with MDM Console.

The problem is when I try to obtain the two specific fields with MDM Java API I get error meaning there is no such field.

I've tried to display the list of all the fields in the table with record.getFields() or with the repository schema but anyway I can not get those two fields. It look's like there are no the fields in the table.

The interesting thing is I can get all the other fields for the record but not for the two specific fields. Why it happens?

Thanks and Regards,

Sergey