Clarification on --manage-heic-jpeg=KeepHeic

[vw-kombi]

I am battling duplicates issue in immich where the heic is deemed the throw away as the Jpeg is bigger - I have tens of thousands of these. I see there is this new thing so I am thinking I will delete all photo's and start again.

If I do it in this order, with the jpg's in the file system come into immich, or will immich-go see that there is one there already (the heic ?)

1 - Import all heic from icloudPD on my file system - this will do all photos and vids currently on iphone
2 - import my photo's from my filesystem (going back to 1999) - this will do all photos' but has some jpg's from the old heic-jpg conversion in the early days for heic.
3 - import google photos takeout (just in case of any missed).

[simulot]

The HEIC-JPEG de-duplication relies on the file name and the date of capture.
The success depend on how the conversion has been done. You should do some tests using the dry mode and check the logs.

Immich-go could de-duplicate the input during the upload process.
You can run immich-go stack --manage-heic-jpeg=KeepHeic command to clean up your immich database:

Stack photos related to each other according to the options

Usage:
  immich-go stack [flags]

Flags:
  -k, --api-key string                 API Key
      --api-trace                      Enable trace of api calls
      --client-timeout duration        Set server calls timeout (default 5m0s)
      --date-range date-range          photos must be taken in the date range (default unset)
      --device-uuid string             Set a device UUID (default "gl65")
      --dry-run                        Simulate all actions
  -h, --help                           help for stack
      --manage-burst BurstFlag         Manage burst photos. Possible values: Stack, StackKeepRaw, StackKeepJPEG
      --manage-epson-fastfoto          Manage Epson FastFoto file (default: false)
      --manage-heic-jpeg HeicJpgFlag   Manage coupled HEIC and JPEG files. Possible values: KeepHeic, KeepJPG, StackCoverHeic, StackCoverJPG
      --manage-raw-jpeg RawJPGFlag     Manage coupled RAW and JPEG files. Possible values: KeepRaw, KeepJPG, StackCoverRaw, StackCoverJPG
  -s, --server string                  Immich server address (example http://your-ip:2283 or https://your-domain)
      --skip-verify-ssl                Skip SSL verification
      --time-zone string               Override the system time zone