升级到rails 6.1时，由于schema_migrations表中的条目被删除，我的规范失败

ActiveRecord::SchemaMigration.count
   (2.1ms)  SELECT COUNT(*) FROM "SCHEMA_MIGRATIONS"
 => 1

ActiveRecord::NoEnvironmentInSchemaError:

Environment data not found in the schema. To resolve this issue, run:

        bin/rails db:environment:set RAILS_ENV=test

Failure/Error: ActiveRecord::Migration.maintain_test_schema!

ActiveRecord::PendingMigrationError:

  Migrations are pending. To resolve this issue, run:

          bin/rails db:migrate RAILS_ENV=test

当我运行以下命令时

bin/rails db:environment:set RAILS_ENV=test

它在schema_migrations表中添加条目。
但当我跑的时候

rspec spec/

它从schema_migrations表中删除了我的所有条目，除了1个条目。我怀疑问题出在数据库清理器中。另外，我检查了一些post，但到目前为止没有运气
轨道_助手.rb

require 'simplecov'
SimpleCov.start 'rails'
# This file is copied to spec/ when you run 'rails generate rspec:install'
require 'spec_helper'
ENV['RAILS_ENV'] ||= 'test'
require File.expand_path('../../config/environment', __FILE__)
# Prevent database truncation if the environment is production
abort("The Rails environment is running in production mode!") if Rails.env.production?
require 'rspec/rails'
require 'json_matchers/rspec'
# Add additional requires below this line. Rails is not loaded until this point!

require 'database_cleaner'

Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    with.test_framework :rspec
    with.library :rails
  end
end

#
Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }

ActiveRecord::Migration.maintain_test_schema!

RSpec.configure do |config|
  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  config.use_transactional_fixtures = true

  config.infer_spec_type_from_file_location!

  # Filter lines from Rails gems in backtraces.
  config.filter_rails_from_backtrace!
  # arbitrary gems may also be filtered via:
  # config.filter_gems_from_backtrace("gem name")
  config.include FactoryBot::Syntax::Methods

  config.before(:suite) do
    DatabaseCleaner.clean_with :truncation, expect: %w(ar_internal_metadata schema_migrations)
    DatabaseCleaner.strategy = :transaction
  end

  config.around(:each) do |example|
    DatabaseCleaner.cleaning do
      example.run
    end
  end

  config.include RequestSpecHelper
  config.include ControllerSpecHelper
end

数据库清理程序（2.0.1）
轨道（6.1）
Ruby（2.5.0）
活动记录-oracle_增强-适配器（6.1.4）
Ruby-氯化钠（2.2.6.1）
注意：我使用oracle作为数据库