While migrating content from Vault, the following error message appears: Error: While upserting record [Record ID::Status] Cause: duplicate value found: Vault_External_Id_vod__c duplicates value on record with id [Record ID] even though there are no duplicate IDs in the system.
This is caused by having Vault_External_Id_vod__c marked as External ID and Unique Case Sensitive when syncing over both Approved and Staged Content. When both are being synced, this should never be the case.
Remove those attributes from Vault_External_Id_vod__c and resync the content.
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