Active Directory error applying Exchange 2010 SP1

Hello,

I'm running into this error while trying to apply Exchange 2010 SP1.

Summary: 15 item(s). 0 succeeded, 1 failed.
Elapsed time: 00:00:13

Organization Preparation
Failed

Error:
The following error was generated when "$error.Clear();
 install-AdministrativeGroup -DomainController $RoleDomainController

" was run: "Active Directory operation failed on EXCHANGE2010.17a-4.com. The object 'CN=Folder Hierarchies,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=17a-4 LLC,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=17a-4,DC=com' already exists.".

Active Directory operation failed on EXCHANGE2010.17a-4.com. The object 'CN=Folder Hierarchies,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=17a-4 LLC,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=17a-4,DC=com' already exists.

The object exists.
Click here for help... http://technet.microsoft.com/en-US/library/ms.exch.err.default(EXCHG.141).aspx?v=14.1.218.11&e=ms.exch.err.Ex88D115&l=0&cl=cp

Elapsed Time: 00:00:13

Any thoughts??

Thanks,

Curt