you might want to read the "fedup" fedora documentation
https://fedoraproject.org/wiki/FedUp...or_the_Upgrade
and the common bugs
https://fedoraproject.org/wiki/Commo...Upgrade_issues
but i would save important data and reinstall
i had NEVER in 5 years NEVER had a upgrade in fedora work !!!
some people have
but i have NEVER had one work well