Created MultiNamespaceVirtualMachineStorageMigrationPlan in ns1
For VM in ns2

2026-01-22T10:18:25Z    ERROR   multinamespacestoragemigplan-controller failed to get MultiNamespaceVirtualMachineStorageMigrationPlan for VirtualMachineStorageMigrationPlan   {"multi-namespace-storage-mig-plan-name": "multi-mig-plan", "multi-namespace-storage-mig-plan-namespace": "test-ns-k7tv5", "error": "MultiNamespaceVirtualMachineStorageMigrationPlan.migrations.kubevirt.io \"multi-mig-plan\" not found"}

(But migration succeeds)

4.21.0

Always

1. Create a VM
$ oc get vm -A NAMESPACE       NAME                     AGE   STATUS    READY test-ns-k7tv5   fedora-bronze-egret-28   15m   Running   True

2. Create MultiNS Plan in different namespace:

$ cat multi-migplan-different-ns.yaml 
apiVersion: migrations.kubevirt.io/v1alpha1
kind: MultiNamespaceVirtualMachineStorageMigrationPlan
metadata:
  name: multi-mig-plan
  namespace: test-ns-multi-mig-plan-l4g6i
spec:
  namespaces:
  - name: test-ns-k7tv5
    virtualMachines:
    - name: fedora-bronze-egret-28
      targetMigrationPVCs:
      - volumeName: rootdisk
        destinationPVC:
          storageClassName: ocs-storagecluster-ceph-rbd-virtualization

3. No Status shown (after 8 minutes, usually shown instantly)

$ oc get MultiNamespaceVirtualMachineStorageMigrationPlan -A
NAMESPACE                      NAME             AGE
test-ns-multi-mig-plan-l4g6i   multi-mig-plan   8m38s
 
$ oc get MultiNamespaceVirtualMachineStorageMigrationPlan -n test-ns-multi-mig-plan-l4g6i multi-mig-plan -oyaml
apiVersion: migrations.kubevirt.io/v1alpha1
kind: MultiNamespaceVirtualMachineStorageMigrationPlan
metadata:
  creationTimestamp: "2026-01-22T10:18:25Z"
  generation: 1
  name: multi-mig-plan
  namespace: test-ns-multi-mig-plan-l4g6i
  resourceVersion: "36207848"
  uid: c1eeb229-da2a-4db1-8074-ec592be2416f
spec:
  namespaces:
  - name: test-ns-k7tv5
    virtualMachines:
    - name: fedora-bronze-egret-28
      targetMigrationPVCs:
      - destinationPVC:
          storageClassName: ocs-storagecluster-ceph-rbd-virtualization
        volumeName: rootdisk

But singleNS plan reports Ready

$ oc get VirtualMachineStorageMigrationPlan -A
NAMESPACE       NAME                           READY   PROGRESSING   COMPLETED VMS   AGE
test-ns-k7tv5   multi-mig-plan-test-ns-k7tv5   True    False         0/1             8m47s

Created MultiNS Migration:

$ cat multi-migration.yaml 
apiVersion: migrations.kubevirt.io/v1alpha1
kind: MultiNamespaceVirtualMachineStorageMigration
metadata:
  name: migration-for-multi-mig-plan
  namespace: test-ns-multi-mig-plan-l4g6i
spec:
  multiNamespaceVirtualMachineStorageMigrationPlanRef: 
    name: "multi-mig-plan"

It completed and reported status in MultiNS resource:

$ oc get MultiNamespaceVirtualMachineStorageMigration -n test-ns-multi-mig-plan-l4g6i migration-for-multi-mig-plan -oyaml
apiVersion: migrations.kubevirt.io/v1alpha1
kind: MultiNamespaceVirtualMachineStorageMigration
metadata:
  creationTimestamp: "2026-01-22T10:33:38Z"
  generation: 1
  name: migration-for-multi-mig-plan
  namespace: test-ns-multi-mig-plan-l4g6i
  resourceVersion: "36222670"
  uid: 00d3cc2a-3daf-42af-bfce-bcad268f2893
spec:
  multiNamespaceVirtualMachineStorageMigrationPlanRef:
    name: multi-mig-plan
status:
  namespaces:
  - completedMigrations:
    - fedora-bronze-egret-28
    name: test-ns-k7tv5
    phase: Completed

No status report in MultiNamespaceVirtualMachineStorageMigration if VM is in a different namespace 

Status report for all VMs in all namespaces