We just upgraded to 12.5 in QA. I'm wondering if anyone else has run across issues. The first issue we encountered was running the installer on our additional engines.
- We worked around this issue with support by uninstalling Solarwinds Information services but seems like a bug in the installer.

- Also after the upgrade we keep getting a corrupted license store. We have manually reset and re-applied the license but this has occurred 3 times. This is the error we see in the Licensing.BusinessLayer.log:
2019-11-06 15:50:16,942 [7] ERROR SolarWinds.Orion.Core.Common.CoreErrorHandler - Error occured on Business Layer call. Type: SolarWinds.Orion.Licensing.NotFoundException
Message: 'Couldn't find .'
Data: 'System.Collections.ListDictionaryInternal'
InnerException: ''
TargetSite: 'Void AssignExactlyTo(SolarWinds.Orion.Licensing.ILicenseIdentity, System.Collections.Generic.IReadOnlyCollection`1[SolarWinds.Orion.Licensing.ILicenseConsumerIdentity])'
StackTrace: ' at SolarWinds.Orion.Licensing.LicenseStore.AssignExactlyTo(ILicenseIdentity licenseToAssign, IReadOnlyCollection`1 assignTo)
I'll post updates as we keep working with support.