Microsoft has released Windows 10 Insider Preview Build 20246 to Windows Insiders in the Dev Channel. Microsoft has added the name of the branch to FE_RELEASE for all Windows Insiders. According to Microsoft, they are working to change the branch flight builds just they did in May 2020 along with the release of the MN_RELEASE branch. The latest preview build has been named 20246.1 and this indicates that the upcoming build will have a prefix 2, 3, 4, etc at the end.