Saving data from API in data with a field data type

I am trying to save data that comes from API. One of data field is type data.

Here, you can notice that in User_results_by_doc_upload data there is a field called #Ref, it is Results list type.

In this field, I need to save this parameter. It is text type, since it is not possible to assign Results list as type here.

This is API workflow setup. I am assigning to #ref field a parameter Results list type:

In these images, you will see the schedule API workflow, where I am doing a Search to relates the parameter type text that comes from API with Results list data.

I don’t understand what I am doing wrong, it is appearing in red this field. I appreciate any help.