Migration error

gistfile1.txt

** (MatchError) no match of right hand side value: %{columns: ["count"], command: :select, num_rows: 1, rows: [[0]]}
    (ecto) lib/ecto/adapters/postgres.ex:61: Ecto.Adapters.Postgres.ddl_exists?/3
    (ecto) lib/ecto/migration/schema_migration.ex:19: Ecto.Migration.SchemaMigration.ensure_schema_migrations_table!/1
    (ecto) lib/ecto/migrator.ex:36: Ecto.Migrator.migrated_versions/1
    (ecto) lib/ecto/migrator.ex:134: Ecto.Migrator.run/4
    (mix) lib/mix/cli.ex:55: Mix.CLI.run_task/2

migration.ex

defmodule PackageSyncService.Repo.Migrations.CreateUser do
  use Ecto.Migration

  def change do
    create table(:users) do
      add :name, :string

      timestamps
    end

  end
end