When you try to upgrade a SSISDB that is restored in Cumulative Update 1 (CU1) or Cumulative Update 2 (CU2) for Microsoft SQL Server 2019 from earlier versions, you may notice that ISDBUpgradeWizard.exe generates the following error message:
atMicrosoft.SqlServer.IntegrationServices.DBUpgrade.DBUpgradePage.DoWork(Objectsender, DoWorkEventArgs e)
Additionally, the version of the SQL Server instance(15.0.x.x) doesn't match the version of the upgrade tool (15.0.2000).
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This issue is fixed in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: