Today Microsoft released Windows 10 Insider Preview Build 18242 (19H1) to the Insiders on the Skip Ahead ring. This build is predominantly a bug fix release that resolves known issues in the 19H1 branch. 19H1 is the next feature update to be released after the October 2018 Update. […]

from https://www.bleepingcomputer.com/news/microsoft/windows-10-build-18242-19h1-released-with-bug-fixes/