i already had a version ex: 1.2.1 (build 20) released on appstore/ and currently i am developing new things on 1.2.2 and its builds only on testflight, not release yet. also i need to build 1.2.1 (build 21+) for some updates need to release before 1.2.2 lauching, now i meet the issue of "Invalid Pre-Release Train ...", when upload app build into test filght. what should i do while i don't want to upgrade the version number of "1.2.1" before 1.2.2 release ? is it requiered to upgrade the last number of version ?