Hello! I got unexpected behavior in airtable web api.
I use "Update multiple records" (https://airtable.com/developers/web/api/update-multiple-records) method for update or create records if not exists in my table. I use it with "upsert" parameter with two key fields like ["Handle", "Image Position"]. First one is text, second one is number.
Expected behavior: update records if them exists, otherwise create new. Got behavior: always create new records.
Note that updating with one key field works as expected.
In general we need method to import records to airtable from our internal database and keep them up to date.
