Errors with ImportFromCSV api to update unique field data
When I post an importFromCSV api call, I would like to update and add data at the same time. But I couldn't update data since there's one field is unique. And the error code is 51. I've already set the clist in the api call.
Even if a field is not in your clist, if it requires unique values, you will need to import a unique value into that field - because 'blank' or null is can not be a unique value.