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I'm building a Release in Azure DevOps where we are deploying a software package as an application to be used in a batch service. The deployment uses the following commands via Azure Powershell script:

New-AzureRmBatchApplicationPackage -AccountName "$(BatchAccountName)" -ResourceGroupName "$(ResourceGroupName)" -ApplicationId "$(ApplicationId)" -ApplicationVersion "$(Build.BuildNumber)-$(Release.ReleaseId)" -Format zip -FilePath "$(System.DefaultWorkingDirectory)/_artifact/artifact/bin/our-application-ubuntu.16.04-x64.zip"

Set-AzureRmBatchApplication -AccountName "$(BatchAccountName)" -ResourceGroupName "$(ResourceGroupName)" -ApplicationId "$(ApplicationId)" -DefaultVersion "$(Build.BuildNumber)-$(Release.ReleaseId)"

$Context = Get-AzureRmBatchAccount -AccountName "$(BatchAccountName)" -ResourceGroupName "$(ResourceGroupName)"

Get-AzureBatchComputeNode -PoolId "$(PoolId)" -BatchContext $Context | Restart-AzureBatchComputeNode -BatchContext $Context -RebootOption TaskCompletion

The problem is, with each new version deployed via release, the application count increases. I don't see an easy way to remove old versions without causing a potential interruption in how the application is used.

How can I maintain one active version of an application, and clean up old applications as part of my release?

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