After UIM production environment upgrade from version 9.0.2 to 20.3.3 - the old saved PRD reports are not available any more.
PRD (performance report designer) are removed from UIM 20.3. Follow KB201157.
Current UIM Version : 20.3
Previous UIM Version: 9.X or 20.1
Component : UIM - OPERATING CONSOLE
The Older Flash based reports that customer had saved on the UIM 9.0.2 are not available on the UIM 20.3 (which does not support flash any more, check the Deprecated Portlets in 20.3).
Customer can create new custom Ad-hoc reports.
A helpful knowledge article to create a simple Ad Hoc report on a single metric for a group of devices on UIM 20.3 is KB206349.
The older custom Dashboard has been migrated to 20.3.3 UIM without any issue. Also. create new custom Dashboard as per individual requirement following the Techdocs.