rman duplicate to previous version after upgrade

Hello list,

A target database has been upgraded to 10.2.0.3 from 9.2.0.4.
It is now necessary to restore the database to another host taking it
back to a point in time BEFORE the upgrade. I'm using an RMAN catalog
database to store the backup information.
Is it possible to do this with RMAN duplicate, or how can I do this? 

Please help,

 

Regards,

Istvan

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