Earlier prerelease builds from itunesconnect

I had uploaded a new version 1.2.7 itunes connect beta testing and now i want to get some earlier version of my app prerelease. Earlier i have 1.2.6 version in iTunes connect and now, i have 1.2.7. My test flight app only shows 1.2.7 app even if i open the email of 1.2.6 in test-flight. So is there any way that i can get the older prerelease builds after uploading a newer builds. I want to do this for reproduce an issue.