podman tag command creates duplicate <none> image entries

[amisskii]

Issue Description

If I have an image with the tag quay.io/nivologd/httpd-24:latest, and I use the podman tag command to assign the exact same tag to an untagged image, the original image with that tag disappears.

Steps to reproduce the issue

1. Have an image with the tag quay.io/nivologd/httpd-24:latest.
2. Have an untagged image.
3. Use the podman tag command to assign the existing tag to the untagged image. For example: podman tag <image_id_of_untagged_image> quay.io/nivologd/httpd-24:latest.

Describe the results you received

Both the original image and the untagged image have the tag.

Describe the results you expected

Podman prevents using the same tag for two images.

podman info output

podman info
Client:
  APIVersion: 5.6.0
  BuildOrigin: pkginstaller
  Built: 1755272543
  BuiltTime: Fri Aug 15 17:42:23 2025
  GitCommit: da671ef6cfa3fc9ac6225c18f1dd0a70a951e43f
  GoVersion: go1.25.0
  Os: darwin
  OsArch: darwin/arm64
  Version: 5.6.0
host:
  arch: arm64
  buildahVersion: 1.41.4
  cgroupControllers:
  - cpuset
  - cpu
  - io
  - memory
  - pids
  - rdma
  - misc
  - dmem
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.13-1.fc42.aarch64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.13, commit: '
  cpuUtilization:
    idlePercent: 99.66
    systemPercent: 0.24
    userPercent: 0.1
  cpus: 7
  databaseBackend: sqlite
  distribution:
    distribution: fedora
    variant: coreos
    version: "42"
  emulatedArchitectures:
  - linux/386
  - linux/amd64
  - linux/arm64be
  eventLogger: journald
  freeLocks: 2046
  hostname: localhost.localdomain
  idMappings:
    gidmap: null
    uidmap: null
  kernel: 6.15.9-201.fc42.aarch64
  linkmode: dynamic
  logDriver: journald
  memFree: 2785366016
  memTotal: 3787653120
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.16.0-1.fc42.aarch64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.16.0
    package: netavark-1.16.0-1.fc42.aarch64
    path: /usr/libexec/podman/netavark
    version: netavark 1.16.0
  ociRuntime:
    name: crun
    package: crun-1.23.1-1.fc42.aarch64
    path: /usr/bin/crun
    version: |-
      crun version 1.23.1
      commit: d20b23dba05e822b93b82f2f34fd5dada433e0c2
      rundir: /run/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +LIBKRUN +WASM:wasmedge +YAJL
  os: linux
  pasta:
    executable: /usr/bin/pasta
    package: passt-0^20250805.g309eefd-2.fc42.aarch64
    version: |
      pasta 0^20250805.g309eefd-2.fc42.aarch64-pasta
      Copyright Red Hat
      GNU General Public License, version 2 or later
        <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.
  remoteSocket:
    exists: true
    path: unix:///run/podman/podman.sock
  rootlessNetworkCmd: pasta
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: false
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.3.1-2.fc42.aarch64
    version: |-
      slirp4netns version 1.3.1
      commit: e5e368c4f5db6ae75c2fce786e31eef9da6bf236
      libslirp: 4.8.0
      SLIRP_CONFIG_VERSION_MAX: 5
      libseccomp: 2.5.5
  swapFree: 0
  swapTotal: 0
  uptime: 0h 14m 40.00s
  variant: v8
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - docker.io
store:
  configFile: /usr/share/containers/storage.conf
  containerStore:
    number: 1
    paused: 0
    running: 0
    stopped: 1
  graphDriverName: overlay
  graphOptions:
    overlay.additionalImageStores:
    - /usr/lib/containers/storage
    overlay.imagestore: /usr/lib/containers/storage
    overlay.mountopt: nodev,metacopy=on
  graphRoot: /var/lib/containers/storage
  graphRootAllocated: 99252940800
  graphRootUsed: 8683622400
  graphStatus:
    Backing Filesystem: xfs
    Native Overlay Diff: "false"
    Supports d_type: "true"
    Supports shifting: "true"
    Supports volatile: "true"
    Using metacopy: "true"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 5
  runRoot: /run/containers/storage
  transientStore: false
  volumePath: /var/lib/containers/storage/volumes
version:
  APIVersion: 5.6.1
  BuildOrigin: 'Copr: packit/containers-podman-26994'
  Built: 1756944000
  BuiltTime: Thu Sep  4 02:00:00 2025
  GitCommit: 1e2b2315150b2ffa0971596fb5da8cd83f3ce0e1
  GoVersion: go1.24.6
  Os: linux
  OsArch: linux/arm64
  Version: 5.6.1

Podman in a container

No

Privileged Or Rootless

None

Upstream Latest Release

Yes

Additional environment details

Additional environment details

Additional information

Additional information like issue happens only occasionally or issue happens with a particular architecture or on a particular setting

[Luap99]

Both the original image and the untagged image have the tag.

That doesn't seem to be true? The tag is only on the newly tagged image while the old one gets it tagged removed which is the expected behavior, are you seeing something else? Please provide exact commands used and their output, i.e. this is what I see

$ podman images
REPOSITORY                             TAG         IMAGE ID      CREATED        SIZE
<none>                                 <none>      762545103d31  5 seconds ago  1.19 kB
ghcr.io/home-assistant/home-assistant  stable      f34e1b7552d2  4 days ago     2.15 GB
quay.io/libpod/testimage               20241011    b82e560ed57b  11 months ago  12.2 MB
$ podman tag 762545103d31 ghcr.io/home-assistant/home-assistant:stable 
$ podman images
REPOSITORY                             TAG         IMAGE ID      CREATED         SIZE
ghcr.io/home-assistant/home-assistant  stable      762545103d31  24 seconds ago  1.19 kB
<none>                                 <none>      f34e1b7552d2  4 days ago      2.15 GB
quay.io/libpod/testimage               20241011    b82e560ed57b  11 months ago   12.2 MB

[github-actions]

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• provide an exact reproducer where possible
• verify you have provided all relevant information - minimum is podman info
• answer any follow up questions

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