New
#11
If you really want 1903, do an image backup of your current installation >> Just in case! << and then manually initiate the installation.
I have a pair of computers that are 100% the same in every single respect. One system I upgraded manually a month ago and it runs 1903 flawlessly. The other system is still reporting that it is not ready for 1903. I'm going to force the update on it this weekend.