Do not revert to the previous version that way.
Do it this way:
1 - Install everything, including the 1909 version and all its updates.
2 - Go to the windows program uninstaller.
3 - (On the left side) Select to
view installed updates the window will become uninstall an update.
4 - Select and uninstall the following update:
feature update to windows 10 version 1909 via enablement package (KB4517245)
(Uninstall only this update)
Important notes:
1 - I'm not using version 1909 so the name of the update to uninstall may be slightly different...
2 - English is not my first language, so the tips I'm giving you may have slightly different names on your windows, since my windows is not in English...
I hope I was able to help.