I checked the log:
# grep -A3 -B3 '774 layout' migration.log
✓ 774 logs <EventLogEntry(None, None, 2018-08-25 10:56:45.759868+00:00, event, Timetable): Created new session block:>
✓ 774 logs <EventLogEntry(None, None, 2018-08-25 10:56:55.124119+00:00, event, Timetable): Created new session block:>
✓ 774 payment Payment enabled=False, currency=
✓ 774 layout - Layout settings
✓ 774 menus Custom menu
✓ 774 regform 2018-08-17 - Registration Form
i 774 regform Section/Personal - Personal Data
I didn’t find any error in.
These are cloned event. We had other problem with similar cloned event during the migration (eg After migration, lost registration form and data )