According to the document from MIFOS-3458, If a question group with the title of migrating survey already exists and Survey and QG belong to different flows: a) The present survey should not be migrated and a validation message "A question group with same title already belongs to a different flow" with reference id for survey should be logged in the tomcat log automatically. Actually the present survey is migrated and this validation message is not logged in the tomcat log.
Marking as fixed, b/c we have changed it so that migration is upon upgrade, this scenario should not occur. Adding documentinfs label to make sure our Upgrade Notes / QG FS are updated appropriately
This scenario is impossible to reproduce on the production environment.