I was reviewing how to upload the beta versions of my application to TestFlight and I found that suffixes such as -beta1, -beta2 can be used, so, currently I had version 2.0.1 in production and I tried to upload 2.0.1-beta1 and this generated the error since I should have uploaded the beta of v2.0.2 and not v2.0.1 since the latter can no longer have betas because it is in production. So using 2.0.2-beta1 instead of 2.0.1-beta1 fixed the problem for me.
LuisVenturo
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