DUPLICATE_DATA on Zoho CRM: Zoho CRM returns a DUPLICATE_DATA error when creating or updating a contact, lead, or record. The API response contains a JSON object with code: DUPLICATE_DATA and identifies the duplicate field (e.g., Email). The record is not saved and the operation fails silently in some integrations. — Root cause: The DUPLICATE_DATA error occurs when you attempt to create a new record (like a Lead or Contact) that contains a value in a unique field (usually Email or Phone) that already exists in your Zoho CRM database. Zoho CRM's Duplicate Check Preference blocks the creation of the record to prevent dirty data, causing your automation workflow in Zapier, Make.com, or custom API scripts to fail. — If you continue to receive errors after switching to Upsert, verify that the A