diff --git a/db/docs/batched_background_migrations/backfill_oid_on_lfs_objects_projects.yml b/db/docs/batched_background_migrations/backfill_oid_on_lfs_objects_projects.yml
new file mode 100644
index 0000000000000000000000000000000000000000..7023f878c3814c03acd521bea14887e99de1e7bf
--- /dev/null
+++ b/db/docs/batched_background_migrations/backfill_oid_on_lfs_objects_projects.yml
@@ -0,0 +1,8 @@
+---
+migration_job_name: BackfillOidOnLfsObjectsProjects
+description: Backfill lfs_objects_projects.oid from related lfs_object
+feature_category: source_code_management
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/207128
+milestone: '18.6'
+queued_migration_version: 20251001143946
+finalized_by: # version of the migration that finalized this BBM
diff --git a/db/post_migrate/20251001143946_queue_backfill_oid_on_lfs_objects_projects.rb b/db/post_migrate/20251001143946_queue_backfill_oid_on_lfs_objects_projects.rb
new file mode 100644
index 0000000000000000000000000000000000000000..9ecae47ce624a1273de9a0635d2d95f0bc1f2ff7
--- /dev/null
+++ b/db/post_migrate/20251001143946_queue_backfill_oid_on_lfs_objects_projects.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+class QueueBackfillOidOnLfsObjectsProjects < Gitlab::Database::Migration[2.3]
+  milestone '18.6'
+
+  restrict_gitlab_migration gitlab_schema: :gitlab_main
+
+  MIGRATION = "BackfillOidOnLfsObjectsProjects"
+  BATCH_SIZE = 1000
+  SUB_BATCH_SIZE = 100
+
+  def up
+    queue_batched_background_migration(
+      MIGRATION,
+      :lfs_objects_projects,
+      :id,
+      batch_size: BATCH_SIZE,
+      sub_batch_size: SUB_BATCH_SIZE
+    )
+  end
+
+  def down
+    delete_batched_background_migration(MIGRATION, :lfs_objects_projects, :id, [])
+  end
+end
diff --git a/db/schema_migrations/20251001143946 b/db/schema_migrations/20251001143946
new file mode 100644
index 0000000000000000000000000000000000000000..80b010f34d32dfdae16fc20fcf99488a762eced6
--- /dev/null
+++ b/db/schema_migrations/20251001143946
@@ -0,0 +1 @@
+7e591665aaf165e6dbac1d73cb1ee05451688b2ec3cf340cb16d982e955e9fd3
\ No newline at end of file
diff --git a/lib/gitlab/background_migration/backfill_oid_on_lfs_objects_projects.rb b/lib/gitlab/background_migration/backfill_oid_on_lfs_objects_projects.rb
new file mode 100644
index 0000000000000000000000000000000000000000..b9259e964b7e2ff7f4c0463110acba0a9ec4cee1
--- /dev/null
+++ b/lib/gitlab/background_migration/backfill_oid_on_lfs_objects_projects.rb
@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module BackgroundMigration
+    class BackfillOidOnLfsObjectsProjects < BatchedMigrationJob
+      operation_name :backfill_lfs_objects_projects_oid
+      feature_category :source_code_management
+
+      def perform
+        each_sub_batch do |sub_batch|
+          lfs_obj_proj_ids = sub_batch.select(:id).map(&:id).join(', ')
+
+          connection.execute(
+            <<~SQL
+              UPDATE "lfs_objects_projects"
+              SET
+                "oid" = "lfs_objects"."oid"
+              FROM
+                "lfs_objects"
+              WHERE
+                "lfs_objects_projects"."oid" IS NULL
+                AND "lfs_objects_projects"."lfs_object_id" = "lfs_objects"."id"
+                AND "lfs_objects_projects"."id" IN (#{lfs_obj_proj_ids})
+            SQL
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/spec/lib/gitlab/background_migration/backfill_oid_on_lfs_objects_projects_spec.rb b/spec/lib/gitlab/background_migration/backfill_oid_on_lfs_objects_projects_spec.rb
new file mode 100644
index 0000000000000000000000000000000000000000..1eede9308f8fc634c27eb79f7eb0ba9e4e771bdb
--- /dev/null
+++ b/spec/lib/gitlab/background_migration/backfill_oid_on_lfs_objects_projects_spec.rb
@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Gitlab::BackgroundMigration::BackfillOidOnLfsObjectsProjects, feature_category: :source_code_management do
+  let(:connection) { ApplicationRecord.connection }
+
+  let(:projects_table) { table(:projects) }
+  let(:lfs_objects_table) { table(:lfs_objects) }
+  let(:lfs_objects_projects_table) { table(:lfs_objects_projects) }
+  let(:lfs_object_size) { 20 }
+
+  let(:organization) { table(:organizations).create!(name: 'organization', path: 'organization') }
+
+  let(:namespace) { table(:namespaces).create!(name: 'ns1', path: 'ns1', organization_id: organization.id) }
+
+  let(:project) do
+    projects_table.create!(
+      namespace_id: namespace.id,
+      project_namespace_id: namespace.id,
+      organization_id: organization.id
+    )
+  end
+
+  let(:lfs_object) do
+    lfs_objects_table.create!(
+      oid: 'f2b0a1e7550e9b718dafc9b525a04879a766de62e4fbdfc46593d47f7ab74636',
+      size: lfs_object_size
+    )
+  end
+
+  let!(:lfs_objects_project) do
+    lfs_objects_projects_table.create!(project_id: project.id, lfs_object_id: lfs_object.id, repository_type: 0)
+  end
+
+  let(:job_params) do
+    {
+      batch_table: :lfs_objects_projects,
+      batch_column: :id,
+      pause_ms: 0,
+      sub_batch_size: QueueBackfillOidOnLfsObjectsProjects::SUB_BATCH_SIZE,
+      connection: connection
+    }
+  end
+
+  let(:migration) { described_class.new(**job_params) }
+
+  it "backfills oid from the lfs_objects" do
+    expect(lfs_objects_project.oid).to be_nil
+
+    migration.perform
+
+    expect(lfs_objects_project.reload.oid).to eq(lfs_object.oid)
+  end
+end
diff --git a/spec/migrations/20251001143946_queue_backfill_oid_on_lfs_objects_projects_spec.rb b/spec/migrations/20251001143946_queue_backfill_oid_on_lfs_objects_projects_spec.rb
new file mode 100644
index 0000000000000000000000000000000000000000..1ae310b4a23f570b45662f7a423387a51f9879fb
--- /dev/null
+++ b/spec/migrations/20251001143946_queue_backfill_oid_on_lfs_objects_projects_spec.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require_migration!
+
+RSpec.describe QueueBackfillOidOnLfsObjectsProjects, migration: :gitlab_main, feature_category: :source_code_management do
+  let!(:batched_migration) { described_class::MIGRATION }
+
+  it 'schedules a new batched migration' do
+    reversible_migration do |migration|
+      migration.before -> {
+        expect(batched_migration).not_to have_scheduled_batched_migration
+      }
+
+      migration.after -> {
+        expect(batched_migration).to have_scheduled_batched_migration(
+          gitlab_schema: :gitlab_main,
+          table_name: :lfs_objects_projects,
+          column_name: :id,
+          batch_size: described_class::BATCH_SIZE,
+          sub_batch_size: described_class::SUB_BATCH_SIZE
+        )
+      }
+    end
+  end
+end