Save documents, using records

Hi, I'm new to appian, and most probably this is a obvious one, well im strugulling.

So I have a form, where I want to upload 3 different documents, therfore all of them are saved into document_cdt using the same id.

On the interface all looks fine, looks like its saving:

Therefore, when a really try to test its not saving the data into document_cdt:

Is it because I have something worng here:

should I add the documentationAppianID ?

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