Critical Description
Creating an invitation for a meeting as non "admin" user of type "USER" returns an "Internal error"
The logfile contains
Unexpected error occurred org.springframework.dao.InvalidDataAccessApiUsageException: Encountered unmanaged object "org.apache.openmeetings.db.entity.user.User@12d1cbb4" in life cycle state unmanaged while cascading persistence via field "org.apache.openmeetings.db.entity.room.Invitation.invitedBy" during flush. However, this field does not allow cascade persist. You cannot flush unmanaged objects or graphs that have persistent associations to unmanaged objects
Creating an invitation as user "admin" works fine.
