Why the nextcloud 10.0 show the upgrade to version 9.1.1 the owncloud, should upgrade to show nextcloud 10.0.1
Known bug. See Notification about an "upgrade" to ownCloud 9.1.1 in Nextcloud 10 stable
Upgrade to 10.0.1 manually to resolve.
i hope this will be the last time upgrade manually!!!
Tanks