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      OverviewMethod of procedure for upgrading IAP from version 2019.x.x and higher for on-premise software. 
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      Stage 1: PrestagingSteps to perform a backup of dependencies. 
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      Stage 2: StagingSteps to download the target IAP release and resync all symlinks. 
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      Stage 3: MigrationCommands and scripts to run the migration process. 
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      Stage 4: Post MigrationSteps to confirm all jobs have migrated. 
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      Stage 5: IAG MigrationSteps to align Automation Gateway with the upgraded IAP version. 
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      TroubleshootingHow to troubleshoot some common errors that may occur in the upgrade. 
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      RollbackHow to restore IAP back to the previous version.