Understanding the Role of Image Tags and IDs in Docker

Two solutions are available for this issue. In your specific case, the first solution can be applied. The third solution involves using a specific command to find dangling/untagged images. This command can also be used to list image layers for the untagged image. Another solution to the error is to edit the image ID, which may have a wrong third character. Additionally, a more generic solution is available for this issue, which has been written and tested in GNU.


Appreciation for michalk’s input. In brief:

  • The Docker registry v2 introduced a “digest,” which is a hash of the manifest.
  • The local image JSON configuration is hashed to generate the image ID.

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