...
The migration script uses the Lists app’s versioning system to update the lists without losing any data. As a result, if a list got broken in some way, the old version of all updated lists are available in the list_versions table (select fql_query from list_versions where list_id = ‘<list ID>' and version = '<version from list_details - 1>), to put back into the list_details table. If the script fails before the UPDATE statement at the end, then the old version of the list will still be used; you’ll need to delete the new version added to list_versions before you try again.
If you need any assistance, feel free to reach out to the Corsair team (#corsair on Slack) or submit a ticket to the MODLISTS Jira project.