Comment 1 for bug 1798804

From logs and the traceback I see that there is fuel-nailgun-extension-cluster-upgrade installed and seems it was installed either before the upgrading to 9.2 or it's just incompatible with 9.2 DB schema. In either case this extension is not supported on 9.2 and should be removed. After removal it should work fine. If after removal it still doesn't work, feel free to re-open the bug.