Cannot successfully Transport a new iOS Build of an existing App on the App Store

ERROR ITMS-90725: "SDK Version Issue. This app was built with the iOS 13.2 SDK. All iOS apps submitted to the App Store must be built with the iOS 14 SDK or later, included in Xcode 12 or later."


ADVICE?
We are getting the exact same error it is a nightmare! Are we really being forced by Apple to update to Xcode 12 or they won't accept our apps to Testflight etc ? In our case we are using Xcode 11 and had no issues up until yesterday. Now our attempts to submit to Testflight are being met with this error.
Umm, I am on XCode 12.

Version 12.5 (12E262)
Estou com o mesmo erro aqui, minha versão do xCode é a 9 ainda
Any idea on how to fix this is, except updating the Xcode to 12.
Any idea on how to fix this is. I can't update the Xcode to 12, as I have some projects working on Xcode 11 now.
same problem, has anyone found a workaround?
Cannot successfully Transport a new iOS Build of an existing App on the App Store
 
 
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