Orchestrator upgrade 2019.10 to 2020.10

Hi,

While upgrading the orchestrator I am getting the below error.

  1. For upgrade I have used .msi package.
  2. I have decrypted my config file too.

Error->An error has occurred while upgrading the Web. config file

Details->

Error->System.Exception: Error while applying config transform for migration 202002181635311_Add_Auth_SharedRobotOAuthClientId. 
Exception: Error while applying config transform for migration 202002181635311_Add_Auth_SharedRobotOAuthClientId. 
Exception: Error while applying config transform for migration 202002181635311_Add_Auth_SharedRobotOAuthClientId. 
Exception: Error while applying config transform for migration 202002181635311_Add_Auth_SharedRobotOAuthClientId. 
Exception: Error while applying config transform for migration 202002181635311_Add_Auth_SharedRobotOAuthClientId. 
Exception: Error while applying config transform for migration 202002181635311_Add_Auth_SharedRobotOAuthClientId. 
Exception: No element in the source document matches '/configuration/appSettings/add[@key='Auth.OAuth.SharedRobotOAuthClientId']'. At XML line 5, position 6. At XML line 5, position 6. At XML line 5, position 6. At XML line 4, position 4. At XML line 3, position 2
   at UiPath.Orchestrator.Setup.ConfigurationMigration.MigratorBase.<>c__DisplayClass10_0.<RunConfigTransforms>b__0(String message)
   at UiPath.Orchestrator.Setup.ConfigurationMigration.ConfigXmlTransformationLogger.LogErrorFromException(Exception ex)
   at Microsoft.Web.XmlTransform.XmlTransformationLogger.LogErrorFromException(Exception ex)
   at Microsoft.Web.XmlTransform.XmlTransformation.Apply(XmlDocument xmlTarget)
   at UiPath.Orchestrator.Setup.ConfigurationMigration.MigratorBase.RunConfigTransforms()
   at UiPath.OrchestratorCAs.ConfigurationService.UpgradeConfiguration(OrchestratorSession session, String migrationHistoryPath, String wdParametersPath)
   at UiPath.OrchestratorCAs.CustomActions.Deferred.UpdateConfigurationAndDatabasesAction.CallEnvironmentMigrations()
   at UiPath.OrchestratorCAs.CustomActions.Deferred.UpdateConfigurationAndDatabasesAction.Execute()
   at UiPath.OrchestratorCAs.CustomActions.Base.BaseCustomAction.InternalExecute()

@chandil

Welcome to forums
Suggest to refer below documentation

Hope this may help you

Thanks