I've been wondering, using `update` of `mongodb` with the `{upsert:true}` options, is it possible to get both `upsertedCount` AND `modifiedCount` be 0?

I understand that the `upsertedCount` refers to the created documents, while the `modifiedCount` refers to the updated documents.

So using the `upsert` I cannot find a scenario in which both of those will be equal to 0.

Am i wrong?

Thanks in advance for the help.