11.13.6 Downgrading Oracle Grid Infrastructure after Upgrade Fails on Remote Nodes
If upgrade of Oracle Grid Infrastructure fails on remote nodes, then you can follow these steps to downgrade Oracle Grid Infrastructure to the earlier release.
Run this procedure from an already upgraded node where the Grid Infrastructure stack of the latest release is running, and downgrade each node where upgrade has failed or completed.
Note:
You can downgrade the cluster nodes in any sequence.