If you would like to update existing records, you need to use the form formula that allows you to edit existing records.
💡Tip
You should be using miniExtensions Form as a replacement for the Airtable Form. It's not possible to integrate miniExtensions Form with Airtable Form. Adding a link to miniExtensions inside your Airtable Form or redirecting to miniExtensions after your Airtable Form does not automatically link the two together.