We see the following error on upgrading/editing machine catalog or deliver group :
"An item with the same key has already been added"

This article is applicable to environments that have been integrated with App Orchestration 

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Check the metadata of catalog by using the following commands :

$a = Get-BrokerCatalog -name "<>" 
$a.MetaDataMap 

We would find a key value pair in meta data for App Orchestration - Key = ExternallyManaged ; Value = CTX138771

To remove the metadata from catalog, run the following command :

Remove-BrokerCatalogMetaData -InputObject $a -Name "ExternallyManaged" 

XD PowerShell objects that could be altered by App Orchestration in this manner include the following: 

• The XD Site PowerShell object. 

• The single HostingUnit PowerShell object. 

• The single HypervisorConnection PowerShell object. 

• 2 Catalog PowerShell objects. 

• All DesktopGroup PowerShell objects. 

• All AssignmentPolicyRule PowerShell objects. 

• All Machine PowerShell objects. 

• All Application PowerShell objects. 

• The single EntitlementPolicyRule PowerShell object 

To remove MetaData from the BrokerConnection use the cmdlet: 
Remove-BrokerHypervisorConnectionMetaData 

To removed for machine : 
Remove-BrokerMachineMetaData 

To remove meta data from BrokerEntitlementPolicyRule : 
Remove-BrokerEntitlementPolicyRuleMetaData 

To remove metadata from Delivery Group:
Remove-BrokerDesktopGroupMetaData 

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Problem Cause

Issue caused by metadata added to the BrokerCatalog by App Orchestration.