Windows error 5941 (ERROR_CLUSTER_GROUP_SINGLETON

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Only one instance of this resource type is allowed per resource group.

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ERROR_CLUSTER_SINGLETON_RESOURCE	ERROR_CLUSTER_RESOURCE_PROVIDER_FAILED

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.

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

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