Remove the existing ManagementPacks and import the following Management Packs from the ManagementPacks folder located on ...

Remove the existing ManagementPacks and import the following Management Packs from the ManagementPacks folder located on the DPM installation DVD or installation file location: 
   - Microsoft.SystemCenter.DataProtectionManager.2012.Library.mp
   - Microsoft.SystemCenter.DataProtectionManager.2012.Discovery.mp. 
and then run the prerequisites check again.