Multiple objects with guid (cross forest mailbox move)

Hi,

While moving 1500 mailbox from 2007 forest to 2010 forest I had a problem with 2 users. When I run the move mailbox script fot these users I got the error below. Any ideas?

New-MoveRequest : Multiple objects with Guid fb091806-4ef7-4a36-8705-8f2c9bb25080 were found.
At C:\Exc2010\script\MoveMailboxes.ps1:22 char:16
+ New-MoveRequest <<<<   -Identity  $($entry.PrimarySMTPAddress)  -RemoteLegacy  -RemoteGlobalCatalog $RemoteDomainCont
roller  -RemoteCredential $RemoteCredentials   -BadItemLimit 2000 -AcceptLargeDataLoss   -TargetDeliveryDomain mydomain.com.tr
    + CategoryInfo          : NotSpecified: (0:Int32) [New-MoveRequest], RemotePermanentException
    + FullyQualifiedErrorId : 68322CDA,Microsoft.Exchange.Management.RecipientTasks.NewMoveRequest

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