Manually changing the generated files to version 1.0 works for now.
insomnyawolf: I can confirm this issue is happening, you can workaround it by changing every
"Version": "1.2",line in[ProjectDirectory]\Intermediate\Build\Win64\UnrealEditor\Development\[ProjectName]to"Version": "1.1",or"Version": "1.0",but as soon as you update and save those files, the version number becomes 1.2 again.
[Open PR here: https://github.com/EpicGames/UnrealEngine/pull/9067 which is marked as the solution to this].