Hi I am testing my code in small batches on Marketo Sandbox but have a problem. I see that new records are created from my CSV data. I only want to update. Quote from The Marketo docs . "You can specify id as lookupField to indicate an “update only” operation. " Marketo bulk import should not create new records if you specify id as a lookupField. I am using `/bulk/v1/leads.json?format=csv&lookupField=id"` If I look at the data new leads/persons with with a fake Id and fake email test@example.com was created in the Sandbox env.
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