fix

app/services/ecs/import_student_service.rb

@@ -14,7 +14,7 @@ class Ecs::ImportStudentService < ApplicationService
     excel = Ecs::ImportStudentExcel.new(params[:file].path)
 
     success_count = 0
-    EcYearStudent.bulk_insert(:student_id, :name, :created_at, :updated_at) do |worker|
+    EcYearStudent.bulk_insert(:ec_year_id, :student_id, :name, :created_at, :updated_at) do |worker|
       excel.read_each do |student_id, name|
         success_count += 1
 
@@ -24,7 +24,7 @@ class Ecs::ImportStudentService < ApplicationService
           next
         end
 
-        worker.add(student_id: student_id, name: name)
+        worker.add(ec_year_id: ec_year.id, student_id: student_id, name: name)
       end
     end