OCI-43559
Cannot encrypt column with salt on table 'string': notification directive 'string' cannot have a key column be encrypted with salt
Cause
A column specified as key column in a notification directive cannot be encrypted with salt because notification directive has created an index on this key column, and indexes are not supported on encrypted columns with salt.
Action
Encrypt key column without salt or change the notification directive's key column to a non-salted column using ALTER DIRECTIVE.