Migrating to ARIS 9

Hi,

we updated our ARIS Landscape from 7.2 to 9.6 so we want to do this with some of our databases as well. After we migrated a database with some customized Attributes we get in 9.6 the information that there is a Attribute but it has neither name (other then User-Specific) nor values just "???"

Is it possible to get those attributes somehow?

Best regards

Tobias