Preview and thumbnails showing as individual assets in main timeline

[Minos2020]

I have searched the existing issues, both open and closed, to make sure this is not a duplicate report.

• Yes

The bug

Recently I have added a lot of pictures from a google takout with the help of Immich-Go. At first, it seemed to work perfectly (maybe it is), all images showing nicely in the timeline (they are from the 2000's).
But a few hours/days later, a lot of images and even more videos that should be from the 2000's started appearing in the current day in the timeline, which of course is wrong. Looking a bit closer (and using the marvelous "Show similar photos" option), I discovered that these new pictures that appear wrongly in the timeline are actually supposed to be the "_previews" and "_thumbnails" versions of the original files. For a reason that I don't get, they show up as individual asset in the timeline, resulting in duplicates of various res, with only the original file being correctly placed into the timeline...

Here are some screenshots to illustrate. 3 differents versions of the same photo :

The original image with a correct date :

The preview version with a wrong date :

The thumbnail version with the same wrong date :

In fact, I even have a fourth version due to a recent Storage template migration job... I thought it would delete the former files and directories but it seems that it kept both files at the same time.. ? Maybe I did not understand very well the use of that feature, but here is the fourth version resulting (date is correct) :

Thank you for your help 🙏

The OS that Immich Server is running on

Ubuntu 24.04 LTS

Version of Immich Server

v2.6.3

Version of Immich Mobile App

v2.6.3 build.5041

Platform with the issue

• Server
• Web
• Mobile

Device make and model

Nothing Phone 2

Your docker-compose.yml content

#
# WARNING: To install Immich, follow our guide: https://immich.app/docs/install/docker-compose
#
# Make sure to use the docker-compose.yml of the current release:
#
# https://github.com/immich-app/immich/releases/latest/download/docker-compose.yml
#
# The compose file on main may not be compatible with the latest release.

name: immich

services:
  immich-server:
    container_name: immich_server
    image: ghcr.io/immich-app/immich-server:${IMMICH_VERSION:-release}
    # extends:
    #   file: hwaccel.transcoding.yml
    #   service: cpu # set to one of [nvenc, quicksync, rkmpp, vaapi, vaapi-wsl] for accelerated transcoding
    volumes:
      # Do not edit the next line. If you want to change the media storage location on your system, edit the value of UPLOAD_LOCATION in the .env file
      - ${UPLOAD_LOCATION}:/usr/src/app/upload
      - /etc/localtime:/etc/localtime:ro
      - /mnt/dd_malo/Photos_Videos://mnt/dd_malo/Photos_Videos
    env_file:
      - stack.env
    ports:
      - '2283:2283'
    depends_on:
      - redis
      - database
    restart: always
    healthcheck:
      disable: false
    networks:
      - default
      - web

  immich-machine-learning:
    container_name: immich_machine_learning
    # For hardware acceleration, add one of -[armnn, cuda, rocm, openvino, rknn] to the image tag.
    # Example tag: ${IMMICH_VERSION:-release}-cuda
    image: ghcr.io/immich-app/immich-machine-learning:${IMMICH_VERSION:-release}
    # extends: # uncomment this section for hardware acceleration - see https://immich.app/docs/features/ml-hardware-acceleration
    #   file: hwaccel.ml.yml
    #   service: cpu # set to one of [armnn, cuda, rocm, openvino, openvino-wsl, rknn] for accelerated inference - use the `-wsl` version for WSL2 where applicable
    volumes:
      - model-cache:/cache
    env_file:
      - stack.env
    restart: always
    healthcheck:
      disable: false

  redis:
    container_name: immich_redis
    image: docker.io/valkey/valkey:8-bookworm@sha256:42cba146593a5ea9a622002c1b7cba5da7be248650cbb64ecb9c6c33d29794b1
    healthcheck:
      test: redis-cli ping || exit 1
    restart: always

  database:
    container_name: immich_postgres
    image: ghcr.io/immich-app/postgres:14-vectorchord0.3.0-pgvectors0.2.0
    environment:
      POSTGRES_PASSWORD: ${DB_PASSWORD}
      POSTGRES_USER: ${DB_USERNAME}
      POSTGRES_DB: ${DB_DATABASE_NAME}
      POSTGRES_INITDB_ARGS: '--data-checksums'
      # Uncomment the DB_STORAGE_TYPE: 'HDD' var if your database isn't stored on SSDs
      # DB_STORAGE_TYPE: 'HDD'
    volumes:
      # Do not edit the next line. If you want to change the database storage location on your system, edit the value of DB_DATA_LOCATION in the .env file
      - ${DB_DATA_LOCATION}:/var/lib/postgresql/data
    restart: always

volumes:
  model-cache:

networks:
  default:
    name: immich_default
  web:
    external: true

Your .env content

Contains credentials

Reproduction steps

I would like to know too ! 😅

Relevant log output

Additional information

No response