What does Windows error code 5941 (ERROR_CLUSTER_GROUP_SINGLETON_RESOURCE) mean?

ERROR_CLUSTER_GROUP_SINGLETON_RESOURCE

ERROR_CLUSTER_GROUP_SINGLETON_RESOURCE means the resource group can contain only one resource of the specified type. The group design must be changed instead of adding a duplicate.

Inspect the group’s existing resource of that type and the application design that requested another one. The fix is normally to reuse or relocate the singleton resource, or place a separate supported instance in another design boundary.

What to check

• Inspect the current contents of the clustered role.
• Check whether the intended new resource belongs in a different group or should be represented as a dependency/property of the existing resource.
• Avoid deleting the existing resource until its role and dependencies are understood.

Get-ClusterResource | Format-Table Name, ResourceType, OwnerGroup, State

Microsoft: FailoverClusters PowerShell module

Microsoft: Move-ClusterGroup

Microsoft: Get-ClusterLog