Upon dataloading Account Territory records with the Align Dataloader, the following error occurs:
Account Territory Failed to Upsert. Reason: Missing required parameter [name__v].
The issue is caused by a custom field located in the Account object. This custom field is used as an identifier instead of the ID or External ID to match on existing records.
Using custom fields as identifiers is currently not supported with the Align Dataloader.
The field should be removed or Vault Loader needs to be used for dataloading as a solution.
Align Help Documentation: Integrations and Data Loading