I need to upgrade entries on my list once I import a CSV file. Normally I have to choose one key field. But I cannot do this in Zoho Creator.

Right now the entries duplicate instead of update.

If this is not possible. Then are there any other options? Can I maybe create a script that says something like: if new entry field xxx already exist => delete old row.

??

I don't know how to do it. Help, please.