I'm trying to upsert a new Contact record using the Bulk API and it's returning the following error:
[{"errors"=>
[{"fields"=>["DDA_External_Id__c"],
"message"=>["Required fields are missing: [DDA_External_Id__c]"],
"statusCode"=>["REQUIRED_FIELD_MISSING"]}],
"success"=>["false"],
"created"=>["true"]}]
The error seems trivial but I don't know why am I getting it since I do provide such required field:
=> [{"DDA_External_Id__c"=>"x",
"AccountId"=>"x",
"FirstName"=>"x",
"LastName"=>"x",
"Email"=>"x"}]