`rake db:seed` can't connect to remote DB

rubyonrails-talk
1

Problem

I configured database.yml as follows.
and successfully executed rake db:create:primary, rake db:migrate:primary.

# database.yml
staging:
  primary:
    adapter: postgis
    encoding: utf8
    database: app_db
    pool: 5
    username: user
    password: <passwd>
    host: <remote_host>
    port: 5432

Then, executed rake db:seed.
but failed with this errors.

rake aborted!
ActiveRecord::ConnectionNotEstablished: could not connect to server: No such file or directory
	Is the server running locally and accepting
	connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

Caused by:
PG::ConnectionBad: could not connect to server: No such file or directory
	Is the server running locally and accepting
	connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?
Tasks: TOP => db:abort_if_pending_migrations

Why rake db:abort_if_pending_migrations is try connect to local?

Environment

ruby

ruby 3.0.6p216

rails

rails (6.1.7.4)