Possible resolution steps:
- Check which template was used in the source site
- Create a target SP site with the same template
- Remove discovered SP site and all its child sites, webs, members and lists from the ODM UI
- Rediscover it
- Map the sites using a CSV file
- Migrate the site
Discover SP sites from file
https://support.quest.com/technical-documents/on-demand-migration/current/user-guide/25#Discover-man
Map SP sites from file
https://support.quest.com/technical-documents/on-demand-migration/current/user-guide/26#Mapping