Status: IN
The `fieldValidation` parameter defaults to `Ignore` (silently drop unknown fields) before Kubernetes v1.23, and `Warn` (warn on unknown/duplicate fields) from v1.23 onward; `Strict` rejects requests with unknown or duplicate fields.
Source: entries/2026/03/05/en-documentation-openshift_container_platform-417-html-cluster_apis-ipaddress-ip.md
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