Hi Florencia,
I had a look at your xlsx file, which ID field are you referring to exactly? Is it "id_objeto"? If so, can you explain in more details how you are populating this field, as I notice it is a read only note field?
Is this field being populated via a custom URL scheme being launched from another application, or are you opening the existing feature from the Inbox which has existing values for this field?
If you are using the Inbox or custom URL scheme, then how are you using the favorite answers? Favorite answers are used to pre-populate a new survey record with values that were saved as part of a previous survey draft. Therefore, if you use this as well as existing values from an existing record, they will conflict and the favorite answer will over-write the existing value as they are being applied after the existing value is loaded..
Phil.