All dashboards lost after upgrade from 3.1.x to 3.2.1

same error here after migration

ERROR [ConfigurationManagementPeriodical] Error while running migration <V20191125144500_MigrateDashboardsToViews{2019-11-25T14:45:00Z}>

from graylog-3.1-repository_latest.deb to graylog-3.2-repository_latest.deb

please advise