first passport data issue query in ecto

gistfile1.txt

alias Db.Salesforce.{FieldMapping, Organization, SObjectType}
alias Db.Repo
import Ecto.Query

    mappings =
      from(
        [fm, o, t, f, af] in FieldMapping.joined_query(),
        where: t.name == "lead",
        select: [af.name, t.name, o.code, fragment("group_concat(?)", f.field)],
        group_by: [af.name, t.name, o.code],
        having: count("*") > 1
      ) \
      |> Repo.all()