How to fix the Oracle error CRS-01121: Oracle Clusterware was forcibly upgraded without upgrading nodes string.?

In this post, you’ll learn more about the Oracle ErrorCRS-01121: Oracle Clusterware was forcibly upgraded without upgrading nodes string. with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

CRS-01121: Oracle Clusterware was forcibly upgraded without upgrading nodes string.

Reason for the Error CRS-01121: Oracle Clusterware was forcibly upgraded without upgrading nodes string.

Cause: Oracle Clusterware was forcibly upgraded when the above listed nodes were not upgraded.

How to fix the Error CRS-01121: Oracle Clusterware was forcibly upgraded without upgrading nodes string. ?

You can fix this error in Oracle by following the below steps

Action: Delete the above listed nodes using the procedure in the Clusterware Administration and Deployment Guide. If the nodes later become accessible, they can be added back into the cluster.