I am getting the following error trying to Upsert to Product2: INVALID_FIELD: Field name provided, ProductCode does not match an External ID, Salesforce id, or indexed field for Product2.

ProductCode is definitely a field and it is showing as being indexed in the App Setup, Customize, Products area. What am I doing wrong!?

Note: using the SalesForce default sandbox setup - no customisations have been made.

I am sure that this is a daft newbie question, but I've been searching for ages and can't find an answer myself or an example of using upsert for Product2 that answer the question. Thanks in advance!

I am getting the following error trying to Upsert to Product2: INVALID_FIELD: Field name provided, ProductCode does not match an External ID, Salesforce id, or indexed field for Product2.

ProductCode is definitely a field and it is showing as being indexed in the App Setup, Customize, Products area. What am I doing wrong!?

Note: using the SalesForce default sandbox setup - no customisations have been made.

I am sure that this is a daft newbie question, but I've been searching for ages and can't find an answer myself or an example of using upsert for Product2 that answer the question. Thanks in advance!