Domino Nexus only allows control planes and data planes to be out of sync by patch version. For instance, 6.1.0 and 6.1.1 are compatible, but 6.1.0 and 6.2.0 are not.
If your control plane has been upgraded, but the data planes have not, they are marked as degraded in the Admin UI, and new executions are not permitted.
Data plane upgrades can be performed using two methods: UI-based upgrades or manual upgrades.
You can use the Domino UI to upgrade data planes:
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To get started, go to the admin portal, then click Manage resources > Data Planes.
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Identify the data plane that needs an upgrade by looking for a status message indicating that the "Data Plane is running an older version" or "Data Plane is running a different version".
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Click the three vertical dots next to your selected data plane.
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Select Upgrade from the dropdown menu. If the upgrade option is greyed out, you’ll need to upgrade the Data Plane manually instead.
If UI-based upgrades are not available, you’ll need to manually upgrade the Data Plane. See instructions on how to manually upgrade a Data Plane.