Target namespace is different from the source namespace,
VM has dataVolumeTemplate with explicitly specified namespace,
Getting this error on migration:

$ oc get migration -n openshift-mtv migration-cclm-migration-plan-il2a -oyaml
...
  - completed: "2026-02-15T14:12:29Z"
    conditions:
    - category: Advisory
      durable: true
      lastTransitionTime: "2026-02-15T14:12:28Z"
      message: The VM migration has FAILED.
      status: "True"
      type: Failed
    error:
      phase: CreateTarget
      reasons:
      - 'admission webhook "virtualmachine-validator.kubevirt.io" denied the request:
        Embedded DataVolume namespace test-cclm-source-namespace-il2a differs from
        VM namespace cross-cluster-live-migration-test-cclm'

2.10.0

Always 

1.
2.
3.

Migration fails

Migration succeeds - either 'namespace' field in dataVolumeTemplate updated to be the same as the VM target namespace, or 'namespace' field removed from the dataVolumeTemplate in target VM.

VM -oyaml:

$ oc get vm -n test-cclm-source-namespace-il2a vm-from-template-and-imported-dv-1771164566-2293184 -oyaml
apiVersion: kubevirt.io/v1
kind: VirtualMachine
metadata:
  annotations:
    kubemacpool.io/transaction-timestamp: "2026-02-15T14:10:30.075030093Z"
    kubevirt.io/latest-observed-api-version: v1
    kubevirt.io/storage-observed-api-version: v1
  creationTimestamp: "2026-02-15T14:09:27Z"
  finalizers:
  - kubevirt.io/virtualMachineControllerFinalize
  generation: 2
  name: vm-from-template-and-imported-dv-1771164566-2293184
  namespace: test-cclm-source-namespace-il2a
  resourceVersion: "95483721"
  uid: 5413ce34-3a58-4248-9115-1bb54726adb8
spec:
  dataVolumeTemplates:
  - metadata:
      creationTimestamp: null
      name: dv-fedora-imported-cclm
      namespace: test-cclm-source-namespace-il2a
    spec:
      source:
        registry:
          url: docker://quay.io/openshift-cnv/qe-cnv-tests-fedora:41
      storage:
        resources:
          requests:
            storage: 10Gi
        storageClassName: ocs-storagecluster-ceph-rbd-virtualization
  runStrategy: Always
  template:
    metadata:
      creationTimestamp: null
      labels:
        debugLogs: "true"
        kubevirt.io/domain: vm-from-template-and-imported-dv-1771164566-2293184
        kubevirt.io/vm: vm-from-template-and-imported-dv-1771164566-2293184
    spec:
      architecture: amd64
      domain:
        devices:
          disks:
          - disk:
              bus: virtio
            name: dv-disk
          - disk:
              bus: virtio
            name: cloudinitdisk
          rng: {}
        firmware:
          serial: e5978246-9c5e-4a96-8517-d4c01938da27
          uuid: d079482b-ad06-4a23-bedd-d9f9db7ae411
        machine:
          type: pc-q35-rhel9.6.0
        memory:
          guest: 1Gi
        resources: {}
      volumes:
      - dataVolume:
          name: dv-fedora-imported-cclm
        name: dv-disk
      - cloudInitNoCloud:
          userData: |-
            #cloud-config
            chpasswd:
              expire: false
            password: password
            user: fedora
            ssh_pwauth: true            ssh_authorized_keys:
             [ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQClr26FdYCxhE5fjQwy7oJ46Zwqi6CToHA8t/vUyQV6Ov+gTSdZVjqdyZt1OTXqUsfF5Cg24gdYPfgt8BJnVZqn/orcQ1GpEWAeiyJzu1yZynnl3PlG++ej3eM2h+Vx/RRXTb/K1InxvR1ViFNdFBGHLgKUrZawiplEoJizyUEteJzC91Dn9onbWf7eXnILxWeAem96uX3zMgx/FAN34BsyQd+VyaQGOYfWEfnj35dvVtdu1efo7vrWIL+6UK6wHS5A04u6/NAen6bN3GE8MroRIqIGpc4pET/rghdlsipIXsGgh1RYinQUVUjr4WXakPS4PekyaqRaQ0hdK1Yyze6t root@exec1.rdocloud]
            runcmd: ['grep ssh-rsa /etc/crypto-policies/back-ends/opensshserver.config || sudo update-crypto-policies --set LEGACY || true', "sudo sed -i 's/^#\\?PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config", 'sudo systemctl enable sshd', 'sudo systemctl restart sshd']
        name: cloudinitdisk
status:
  conditions:
  - lastProbeTime: null
    lastTransitionTime: "2026-02-15T14:10:41Z"
    status: "True"
    type: Ready
  - lastProbeTime: null
    lastTransitionTime: null
    message: All of the VMI's DVs are bound and ready
    reason: AllDVsReady
    status: "True"
    type: DataVolumesReady
  - lastProbeTime: null
    lastTransitionTime: null
    status: "True"
    type: LiveMigratable
  - lastProbeTime: null
    lastTransitionTime: null
    status: "True"
    type: StorageLiveMigratable
  - lastProbeTime: "2026-02-15T14:11:03Z"
    lastTransitionTime: null
    status: "True"
    type: AgentConnected
  created: true
  desiredGeneration: 2
  observedGeneration: 2
  printableStatus: Running
  ready: true
  runStrategy: Always
  volumeSnapshotStatuses:
  - enabled: true
    name: dv-disk
  - enabled: false
    name: cloudinitdisk
    reason: Snapshot is not supported for this volumeSource type [cloudinitdisk]

Plan -oyaml:

$ oc get plan -n openshift-mtv cclm-migration-plan-il2a -oyaml
apiVersion: forklift.konveyor.io/v1beta1
kind: Plan
metadata:
  annotations:
    populatorLabels: "True"
  creationTimestamp: "2026-02-15T14:12:13Z"
  generation: 1
  name: cclm-migration-plan-il2a
  namespace: openshift-mtv
  resourceVersion: "40812468"
  uid: d971da4b-f687-4034-bef2-e4453b358d37
spec:
  map:
    network:
      name: network-map
      namespace: openshift-mtv
    storage:
      name: storage-map-il2a
      namespace: openshift-mtv
  migrateSharedDisks: true
  preserveStaticIPs: true
  provider:
    destination:
      name: host
      namespace: openshift-mtv
    source:
      name: mtv-source-provider
      namespace: openshift-mtv
  pvcNameTemplateUseGenerateName: true
  runPreflightInspection: true
  skipGuestConversion: false
  targetNamespace: cross-cluster-live-migration-test-cclm
  targetPowerState: auto
  type: live
  useCompatibilityMode: true
  vms:
  - id: f8716fca-6e3b-43b5-abf1-33674d8a1f94
    name: vm-from-template-and-data-source-1771164565-0897048
    namespace: test-cclm-source-namespace-il2a
  - id: 5413ce34-3a58-4248-9115-1bb54726adb8
    name: vm-from-template-and-imported-dv-1771164566-2293184
    namespace: test-cclm-source-namespace-il2a
  - id: 9bfe682a-b0cc-4274-a4ab-b11eca3ed7d4
    name: vm-with-instance-type-1771164567-5791047
    namespace: test-cclm-source-namespace-il2a
  warm: false
status:
  conditions:
  - category: Advisory
    durable: true
    lastTransitionTime: "2026-02-15T14:13:18Z"
    message: The plan execution has FAILED.
    status: "True"
    type: Failed
  - category: Critical
    lastTransitionTime: "2026-02-15T14:56:41Z"
    message: The source provider does not have the Ready condition.
    status: "True"
    type: SourceProviderNotReady
  migration:
    completed: "2026-02-15T14:13:18Z"
    history:
    - conditions:
      - category: Advisory
        durable: true
        lastTransitionTime: "2026-02-15T14:13:18Z"
        message: The plan execution has FAILED.
        status: "True"
        type: Failed
      map:
        network:
          generation: 1
          name: network-map
          namespace: openshift-mtv
          uid: d745587a-bc36-4f34-8937-52edbb69afd9
        storage:
          generation: 1
          name: storage-map-il2a
          namespace: openshift-mtv
          uid: d9c06a56-d102-4611-9d00-290a5328b2e1
      migration:
        generation: 1
        name: migration-cclm-migration-plan-il2a
        namespace: openshift-mtv
        uid: e53a6120-769c-4186-a63c-b98e1e855400
      plan:
        generation: 1
        name: cclm-migration-plan-il2a
        namespace: openshift-mtv
        uid: d971da4b-f687-4034-bef2-e4453b358d37
      provider:
        destination:
          generation: 1
          name: host
          namespace: openshift-mtv
          uid: e27b936c-24a7-4304-a3ab-e2d233b08f09
        source:
          generation: 1
          name: mtv-source-provider
          namespace: openshift-mtv
          uid: 44918e7c-3781-4e09-af0b-08394ca18da0
    started: "2026-02-15T14:12:16Z"
    vms:
    - completed: "2026-02-15T14:13:18Z"
      conditions:
      - category: Advisory
        durable: true
        lastTransitionTime: "2026-02-15T14:13:18Z"
        message: The VM migration has SUCCEEDED.
        status: "True"
        type: Succeeded
      id: f8716fca-6e3b-43b5-abf1-33674d8a1f94
      luks: {}
      name: vm-from-template-and-data-source-1771164565-0897048
      namespace: test-cclm-source-namespace-il2a
      phase: Completed
      pipeline:
      - completed: "2026-02-15T14:12:16Z"
        description: Initialize migration.
        name: Initialize
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:12:16Z"
      - completed: "2026-02-15T14:12:29Z"
        description: Prepare target namespace.
        name: PrepareTarget
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:12:29Z"
      - completed: "2026-02-15T14:13:18Z"
        description: Synchronize source and target VMs.
        name: Synchronization
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:13:18Z"
      started: "2026-02-15T14:12:16Z"
    - completed: "2026-02-15T14:12:29Z"
      conditions:
      - category: Advisory
        durable: true
        lastTransitionTime: "2026-02-15T14:12:28Z"
        message: The VM migration has FAILED.
        status: "True"
        type: Failed
      error:
        phase: CreateTarget
        reasons:
        - 'admission webhook "virtualmachine-validator.kubevirt.io" denied the request:
          Embedded DataVolume namespace test-cclm-source-namespace-il2a differs from
          VM namespace cross-cluster-live-migration-test-cclm'
      id: 5413ce34-3a58-4248-9115-1bb54726adb8
      luks: {}
      name: vm-from-template-and-imported-dv-1771164566-2293184
      namespace: test-cclm-source-namespace-il2a
      phase: Completed
      pipeline:
      - completed: "2026-02-15T14:12:16Z"
        description: Initialize migration.
        name: Initialize
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:12:16Z"
      - description: Prepare target namespace.
        error:
          phase: Running
          reasons:
          - 'admission webhook "virtualmachine-validator.kubevirt.io" denied the request:
            Embedded DataVolume namespace test-cclm-source-namespace-il2a differs
            from VM namespace cross-cluster-live-migration-test-cclm'
        name: PrepareTarget
        phase: Running
        progress:
          completed: 0
          total: 1
      - description: Synchronize source and target VMs.
        name: Synchronization
        phase: Pending
        progress:
          completed: 0
          total: 1
      started: "2026-02-15T14:12:16Z"
    - completed: "2026-02-15T14:13:15Z"
      conditions:
      - category: Advisory
        durable: true
        lastTransitionTime: "2026-02-15T14:13:15Z"
        message: The VM migration has SUCCEEDED.
        status: "True"
        type: Succeeded
      id: 9bfe682a-b0cc-4274-a4ab-b11eca3ed7d4
      luks: {}
      name: vm-with-instance-type-1771164567-5791047
      namespace: test-cclm-source-namespace-il2a
      phase: Completed
      pipeline:
      - completed: "2026-02-15T14:12:16Z"
        description: Initialize migration.
        name: Initialize
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:12:16Z"
      - completed: "2026-02-15T14:12:29Z"
        description: Prepare target namespace.
        name: PrepareTarget
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:12:29Z"
      - completed: "2026-02-15T14:13:15Z"
        description: Synchronize source and target VMs.
        name: Synchronization
        phase: Completed
        progress:
          completed: 0
          total: 1
        started: "2026-02-15T14:13:15Z"
      started: "2026-02-15T14:12:16Z"
  observedGeneration: 1