After upgrading the database, check the DBA_MINING_MODELS view in the upgraded database. The newly upgraded mining models should be listed in this view.
After you have verified the upgrade and confirmed that there will be no need to downgrade, you should set the initialization parameter COMPATIBLE to 12.1.
Note:
The CREATE MINING MODEL privilege must be granted to Data Mining user accounts that will be used to create mining models. Refer to "Creating a Data Mining User" and "Controlling Access to Mining Models and Data" for more information.