Specifying docker image version seems to always use latest

[bandtank]

Using the dockerfile shown here, the version is 8.0.2 as of the time of this post. I changed the image from espocrm/espocrm to espocrm/espocrm:7.5.6, but the version still shows as 8.0.2. It doesn't seem possible, so I'm not sure what I am doing wrong.

version: '3.8'

services:

  mysql:
    image: mysql:8
    container_name: mysql
    command: --default-authentication-plugin=mysql_native_password
    environment:
      MYSQL_ROOT_PASSWORD: root_password
      MYSQL_DATABASE: espocrm
      MYSQL_USER: espocrm
      MYSQL_PASSWORD: database_password
    volumes:
      - mysql:/var/lib/mysql
    restart: always

  espocrm:
    image: espocrm/espocrm:7.5.6
    container_name: espocrm
    environment:
      ESPOCRM_DATABASE_HOST: mysql
      ESPOCRM_DATABASE_USER: espocrm
      ESPOCRM_DATABASE_PASSWORD: database_password
      ESPOCRM_ADMIN_USERNAME: admin
      ESPOCRM_ADMIN_PASSWORD: password
      ESPOCRM_SITE_URL: "http://localhost:8080"
    volumes:
      - espocrm:/var/www/html
    restart: always
    ports:
      - 8080:80

  espocrm-daemon:
    image: espocrm/espocrm:7.5.6
    container_name: espocrm-daemon
    volumes:
      - espocrm:/var/www/html
    restart: always
    entrypoint: docker-daemon.sh

  espocrm-websocket:
    image: espocrm/espocrm:7.5.6
    container_name: espocrm-websocket
    environment:
      ESPOCRM_CONFIG_USE_WEB_SOCKET: "true"
      ESPOCRM_CONFIG_WEB_SOCKET_URL: "ws://localhost:8082"
      ESPOCRM_CONFIG_WEB_SOCKET_ZERO_M_Q_SUBSCRIBER_DSN: "tcp://*:7777"
      ESPOCRM_CONFIG_WEB_SOCKET_ZERO_M_Q_SUBMISSION_DSN: "tcp://espocrm-websocket:7777"
    volumes:
      - espocrm:/var/www/html
    restart: always
    entrypoint: docker-websocket.sh
    ports:
      - 8082:8080

volumes:
  mysql:
  espocrm:​

$ docker compose -f espocrm-default-compose.yml up -d --build
[+] Building 0.0s (0/0) docker:desktop-linux
[+] Running 4/0
✔ Container espocrm-websocket Running 0.0s
✔ Container mysql Running 0.0s
✔ Container espocrm Running 0.0s
✔ Container espocrm-daemon Running​

[bandtank]

I figured it out. For anyone else who doesn't actually know how to use docker, you need to delete the volume after changing the image. That makes zero sense to me, but whatever. It works now.