There are 2 options.
- You can batch resave your project. Close Unreal Editor and then run script:
C:\<PATH_TO_LAUNCHER_INSTALLS>\UE_<VERSION>\Engine\Binaries\Win64\UE4Editor-Cmd.exe C:\<PROJECT_PATH>\<PROJECT_NAME>.uproject -run=ResavePackages -OnlyUnversioned
-
You can disable the warning in DefaultEngine.ini
[Core.System]
ZeroEngineVersionWarning=False