Microsoft announced yesterday that they released "Cumulative Update for Windows 10 Version Next (10.0.17713.1002) (KB4345215)" to Windows Insiders in order to test the servicing pipeline. This is being done to make sure that there are no issues when they push the Insider Preview Build 17713 to Insiders in the slow ring.
Microsoft announced this minor update in an addition to their Insider build 17713 announcement.
UPDATE 7/23: We have released Cumulative Update Build 17713.1002 to Windows Insiders in the Fast ring. This Cumulative Update helps us test the servicing pipeline in preparation for releasing this build to the Slow ring.
This update introduces the following additional known issue:
After this update is installed, the Windows 10 build version will be set to 17713.1002.
Not much was disclosed regarding what this update modifies, but it was announced that this release will cause Windows Defender Application Guard to no longer work. Therefore, if you previously had been using Application Guard, Edge will no be protected with Isolated Browsing.