It seems that the upgrade is getting stuck, or it’s completing a lot of actions and taking longer.
It has created multiple fields and is not updating the database properly, and I don’t know why it’s doing this? How long did it take for other people to upgrade their database?
What version are you updating from? I don’t think there is a DB update in the new version, just updated a site with no problems. As far as I know the last DB update was for 5.5.0 when ACF switched from options to term meta for fields on taxonomies. Are you updating from a version prior to 5.5.0?