hstore throwing a warning for rails migration

migration_file_with_error.rb

class SetupHstore < ActiveRecord::Migration
  def up
    execute "CREATE EXTENSION IF NOT EXISTS hstore"
  end

  def down
    execute "DROP EXTENSION IF EXISTS hstore"
  end
end

migration_file_without_error.rb

class SetupHstore < ActiveRecord::Migration
  def change
    enable_extension :hstore
  end
end

warning.txt

# in a migration after the migration enabling hstore
unknown OID 20863: failed to recognize type of '<hstore_column_name>'. It will be treated as String.