CQL: selecting field by identifier instruction although it is applied to more than one field

[urapadmin]

          okay, the query was a CQL query selecting an additional field like this:

          locus_identifier:
            field_or_instruction: locus.identifier()
            default: ""

The issue here is that the locus table has more than one field marked as identifier(), although one of them is in fact marked as identifier("additional") but that does not seem to matter:

locus:
  structure:
    1:
      arch_context: [datatype(VARCHAR), identifier(), skip_index_on("hidden"), label("locus")]
      alternate_id: [datatype(VARCHAR), identifier("additional"), skip_index_on("hidden")]

The result is an error message like this:
´´table {table} has more than one field with instruction {field}. That is not supported by KioskContext, right now.")``

If have solved it for now in the query by switching to locus.arch_context but will make this a ticket since it could be solved.

Originally posted by @urapadmin in #2313 (comment)

[urapadmin]

In this case I think it should be able to select the field with the primary identifier and ignore the "additional" identifier.