ActiveRecord::RecordNotFound in EnquiriesController#new

can't find record with friendly id: "eiger-mittellegi-ridge"
Extracted source (around line #68):
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def parent_type
return TripCourse.friendly.find(params[:trip_course_id]).enquiries.new(course_date_id: params[:course_date_id]) if params[:trip_course_id]
Enquiry.new
end

Rails.root: /app

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Request

Parameters:

{"locale"=>"en", "trip_course_id"=>"eiger-mittellegi-ridge"}

Response

Headers:

None