Rollback is enabled by default in vSphere 5.1 and later. You can disable rollback in vCenter Server by using the vSphere Web Client.
- In the vSphere Web Client, navigate to a vCenter Server instance.
- On the Manage tab, click Settings..
- Select Advanced Settings and click Edit.
- Select the config.vpxd.network.rollback key, and change the value to false.
If the key is not present, you can add it and set the value to false.
- Click OK.
- Restart vCenter Server to apply the changes.