ERROR_CLUSTER_UPGRADE_INCOMPATIBLE_VERSIONS 0x80071755

Error code 5973 · HRESULT 0x80071755

WINDOWS

The Cluster Functional Level could not be increased because not all nodes in the cluster support the updated version.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_CLUSTER_UPGRADE_INCOMPATIBLE_VERSIONS is a Windows error code (system error 5973, returned as HRESULT 0x80071755) reported by Windows. Its official message is: “The Cluster Functional Level could not be increased because not all nodes in the cluster support the updated version.”

How to fix ERROR_CLUSTER_UPGRADE_INCOMPATIBLE_VERSIONS

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_CLUSTER_UPGRADE_FIX_QUORUM_NOT_SUPPORTEDERROR_CLUSTER_UPGRADE_RESTART_REQUIREDERROR_CLUSTER_UPGRADE_IN_PROGRESSERROR_CLUSTER_UPGRADE_INCOMPLETEERROR_CLUSTER_RESOURCE_IS_REPLICA_VIRTUAL_MACHINEERROR_CLUSTER_AFFINITY_CONFLICTERROR_CLUSTER_RESOURCE_IS_IN_MAINTENANCE_MODE

Source: Microsoft WinError.h

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