[Dump Fail] Failed following Docs this 'Serialization: preloading dashboards in a new Metabase instance'

Hi there,

I follow this Serialization: preloading dashboards in a new Metabase instance

but I can't dump when i try this

it's my docker-compose.yml

version: "3.8"

services:  
  metabase_base1:
    image: metabase/metabase:latest
    environment:
      MB_DB_TYPE: postgres
      MB_DB_DBNAME: metabase
      MB_DB_PORT: 5432
      MB_DB_USER: postgres
      MB_DB_PASS: postgres
      MB_DB_HOST: postgres1
    ports:
      - 53685:3000
    networks:
      - metanet

  metabase_base2:
    image: metabase/metabase:latest
    environment:
      MB_DB_TYPE: postgres
      MB_DB_DBNAME: metabase
      MB_DB_PORT: 5432
      MB_DB_USER: postgres
      MB_DB_PASS: postgres
      MB_DB_HOST: postgres2
    ports:
      - 53686:3000
    networks:
      - metanet

  postgres1:
    image: postgres:latest
    environment:
      POSTGRES_DB: metabase
      POSTGRES_PASSWORD: postgres
      POSTGRES_USER: postgres
    ports:
      - 53687:5432
    networks:
      - metanet

  postgres2:
    image: postgres:latest
    environment:
      POSTGRES_DB: metabase
      POSTGRES_PASSWORD: postgres
      POSTGRES_USER: postgres
    ports:
      - 53688:5432
    networks:
      - metanet

networks:
  metanet:
    driver: bridge

and I run this command

docker run --rm --name metabase-dump --network momenti_metabase_metanet -e MB_DB_CONNECTION_URI="postgres://postgres1:5432/metabase?user=postgres&password=postgres" -v "/tmp/metabase_data:/target" metabase/metabase-enterprise:v1.46.0 "export /target"

But I got this error

If you are a pro/enterprise customer please use the support email ... I am asking you to do so since Serialisation is only available for Pro/Enterprise and these tiers have support included

I just want to follow this docs step.

but should I get a pro/enterprise license ?

Where can I find out that the serialization feature is paid?