At install time, the RC/Migrator for Db2 for z/OS (RCM) @DEFAULT model was created with a Share Option (S/O) of "Y".
How can changes be made to this model.
The creator of the model is the only authid who can make changes to the model when the Share Option is set to "Y".
This model should remain unchanged and there should be a version of the @DEFAULT model for every release in use with Share Option of "Y" so it cannot be modified.
This is because any maintenance applied that makes changes to the @DEFAULT model would simply overwrite any modifications made by a customer with no warning.
In the manual here "Identify @DEFAULT Model Changes" it states:
"Always keep an unchanged version of the @DEFAULT model for every release you install with SHARE OPTION Y so it cannot be modified."
A much better approach is to create additional copies of the original @DEFAULT model that can be changed by other users by creating a Template of the @DEFAULT model.